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FAQ About Basic Knowledge of Power Bank

What is power bank?

Power bank serve as an extra battery’ or external charger for your phone or other electronic devices. It is a portable power source built of rechargeable battery, packed in a small case that can be carried in a handbag or purse. It has at least one input for charging and another recharging port that can be connected to a standard USB cable that can recharge portable electronic devices like smart-phones, media players and tablet PCs.

Most of the newest power-bank models, arrive with built-in Lithium polymer battery, which known by high efficiency and long lifetime.

How do I know which power bank suits my device?

Depending on individual needs and requirements, there are several general criteria to consider when selecting a power bank:

a) Capacity

For example if your phone battery is 1500mAh and is 0% now, a power bank with 2200mAh can charge your phone 1 time. If your phone battery is 3000mAh and is 0% now, a power bank with 2200mAh will not be able to charge your phone to full because the phone battery capacity is higher than the power bank. If you require a power bank that is able to charge your phone several times, you need a power bank with higher capacity.

b) Number of output

1 output to charge 1 device, 2 outputs to charge 2 devices.

c) Output specification

1A-1.5A output is generally for smart-phones, 1.5A-2.0A output is generally for tablets.

How long do I need to charge the power bank?

It’s depending on the REAL CAPACITY of the power bank. The larger REAL CAPACITY, the longer charging time may required. Different charging methods may result different charging time as well. Charging with the original charger will be faster than charging with computer USB port.

How do I charge the power bank?

You can charge your power bank via the charger that came with your phone, computer USB port or using other power bank.

What is the lifespan of the power bank?

Generally, a properly maintained power bank can retain up to 80-90% of its original capacity at 400-500 charge and discharge cycle (charge then discharge = 1 cycle, regardless of whether you charge/ discharge it partially or fully). Until your power bank no longer holds sufficient charge to meet your needs, you may choose to purchase a new one.

Where to buy power bank?

Buy power bank online you can choose Tattu 10400mah power bank, the capacity in fact is 10800mah, and use Lithium Polymer battery cell, high weight and high quality. It charges the iPhone 6S almost 5-6 times, iPad air2 almost 1-1.5times or iPad mini4 1.5-2 times, and also charge Android smart-phones and others.

General Information

– A = Ampere
– mA = mili Ampere
– mAh = mili Ampere hour
– Output from computer’s USB port = about 500mA
– Output from wall plug (3-pin plug) = varies (please refer to specific wall plug specification)
– Output from power bank USB port = varies (please refer to specific power bank model)

Source:http://www.genstattu.com/blog/faq-about-basic-knowledge-of-power-bank/

Top 5 10400mah Power Banks Guides

Power Bank is now almost a necessity. When you search “power bank” in website, too many sources, such as so many brands, so many capacities and appearances that make you unable to choose or need to take a lot of time to choose. So trouble! Now we studied that high capacity is more popular, so we make a guides about top 5 high capacity 10400mah power bank that is popular power banks. Hope it can help you when you choose high capacity power banks..

Top1. Tattu 10400mah power bank

Tattu power bank is a new product, it using high quality Lithium Polymer battery cell, with very light weight body. The capacity is 10400mah (but in fact is 10800mAh), it can be used for most popular smart-phone, MP3, iPad and others. Tattu 10400mah power bank using multi protection safety system. The price is best, but new arrival around end July. It is wort waiting for.

Tattu Spec:

Battery type: Lithium Polymer Battery
Capacity: 10400mAh (In fact is 10800mAh)
Output: 5V 1.0A and 5V 2.1A
3 USB charging port

Top2. Xiaomi mi 10400mah power bank

Xiaomi mi 10400mAh power bank use Lithium-ion batteries from LG and Samsung. And compatible with popular smart-phones, and the charging port automatically adjusts the output. The simple design, the casing is nice but is easily scratched. The price is great.

Xiaomi Spec:

Battery type: Lithium-ion Battery
Capacity: 10400mAh
Output: 5V 2.1A
1 USB charging port

Top3. PNY 10400mAh power bank

PNY 10400mAh power bank featuring a cylindrical design, it has a Lithium-ion battery with a charge capacity of 10400mAh. The power bank includes a built-in LED torch and a power level indicator that shows you how much charge remains in the power bank.

PNY Spec:

Battery type: Lithium-ion Battery
Capacity: 10400mAh
Output: 5V 2.1A
1 USB charging port

 

Top4. Anker 10400mah Portable Charger

This iPhone power bank’s battery has the capacity of 10400mAh, compact enough to fit in the hand, charging iGadgets as many as 4 times. It has a facility for rapid charging at 2.4 amps. Also, this power bank contains safety measures features.

Anker Specs:

Battery type: Lithium-ion Battery
Capacity: 10400mAh
Output: 5V 3.0A
2 USB charging port

Top5. Infinie Power Bank 10400mAh

This power bank looks like a book with a 10400mAh battery capacity, with 4 LED indicators and a battery status under each one. Also, it includes 9 layers of protection from over charging and short-circuits. And last but not the least, there are 4 splendid color alternatives.

Infinie Specs:

Battery type: Lithium-ion Battery
Capacity: 10400mAh
Output: 5V 1.0A
2 USB charging port

Source: http://www.genstattu.com/blog/top-5-high-capacity-10400mah-power-banks-guides/

what jump start car battery safety features

Although use the jump start car battery is easy and common, but there a number of risks inherent in their operation. So before purchasing a jump start car battery, you’d better check to see that jump start car battery safety systems. What jump start car battery safety features you need to know? Let us to see.

1.Short Circuit Protection

Short circuit protection possibly one of the most important safety features on a car jump starter, as a short circuit can potentially lead not only to serious damage to the car jump starter, but also a potential explosion of the battery inside the device. Tattu 12000mah 12v jump starter have short circuit protection, no like other brands, their jump starter is extreme safe that even you connect the positive and negative poles together. No worries of any danger of short circuit. So when you purchasing you’d better check it.

2.Over-Current Protection

Over current protection is limits the current the jump start car battery will deliver to its peak rated current preventing damage to the device.

3.Over-Voltage Protection

This feature prevents too high a voltage from being applied to the unit when charging. Again, this can happen during a mains power surge. Take Tattu 12000mah 12V jump starter as an example: when capacity is up to 95%, battery could not be charged that to prevent over-charging.

4. Over-Charge Protection

The charging circuits on more basic jump starters will not automatically stop charging the device when the batteries are full. With overcharge protection, the charging circuit will “float” charge the jump starter once full, and won’t keep increasing the voltage applied to the cells, which could then overcharge and destroy the battery pack.

5. Over-load Protection

It protects the unit from receiving a current higher than the manufacturer’s specification when charging. This may happen during a surge from the mains power feeding the jump starter’s charger.

6.High / low temperature Protection

Tattu 12000mah car jump starter operation temperature is -10℃ – 55℃. When jump start car battery operation temperature is too high or low, it will make the car jump starter stable.

Tattu 12000mah jump starter have all above safety features, if you interesting in their car jump starter, check out:
http://www.genstattu.com/tattu-400a-12v-12000mah-jump-starter-power-bank-battery-charger-led.html

Source: http://www.genstattu.com/blog/what-jump-start-car-battery-safety-features/

Tattu 12000mAh Car Jump Starter Reviews – Amazing Starter

Hey guys, we received a great product at the genstattu shop today. It is a very well designed jump starter. Once we received we opened the box and even though it had only 40% charger we were able to start a dead Mercedes with a 3.2 V6 engine. The jump starter is recommended for up to 3.0 gas engine but it had no problem starting even bigger engines.
Product link:
http://www.genstattu.com/tattu-400a-12v-12000mah-jump-starter-power-bank-battery-charger-led.html (USA)

http://www.gensace.de/tattu-12000mah-lifepo4-jumpstarter-with-bms-protection-1219.html (EU)

More details:

This jump start car battery uses LiFePO4 and capacity 12000mah (38.4Wh), they have multi-function that it set 12V and USB outputs, can automatically adjust current for connected devices to reach the best charge efficiency and power. It is a portable power supply.

According to their introduce, power supply booster battery for 3.5L Gas and 2L Diesel Engines, up to 30 times with 400A peak current. And can charge it in the car with the car charger of the package; Powering portable car tools, saving you from driving dilemma.

Tattu Jump starter for car has built-in LED flashlight with three different modes: normal, strobe and SOS.

It is worth to remind that it has short circuit protection. No like other brands, jump starter is extreme safe that even you connect the positive and negative poles together. No worries of any danger of short circuit. It is safety..

Specifications:

Power: 400A Peak 12v
Capacity: 12000mAh
Vehicle: 3.5L Gas and 2L Diesel
Input: 15V , 1A
Output: 12V/8A, 5V/1A , 5V/2A
Output Voltage at auto start: 12V
USB Output: 5V – 2A
Charge Mode: CC/CV 15V-1A
Start Current: 270A
Peak Current: 400A
Applicable temperature range: -10 – 55 degree
Weight: 1.5 lb
Product Dimensions: 8 * 3.9 * 1.7 inches (Length * width * height)
LED Flashlight: Built-in Flashlight
(the specifications come from Tattu official shop data)

In conclusion:

Tattu 12000mah jump starter is amazing starter, safely, multi-function, price is low compare to their quality.

Source: http://www.genstattu.com/blog/tattu-12000mah-jump-starter-reviews-amazing-little-starter/

Knowledges to learn when you buy power bank

Nowadays our gadgets are becoming increasingly smaller and lighter so that they can easily be carried in our pockets.For example, mobile phones, which were earlier on quite cumbersome and bulky are now smart (thus called smart-phones). However, with enhanced smart-phones as well as an enormous boost of their usage comes also the necessity to charge them all the time. Thereby, many firms have started introducing power banks onto the market. Genstattu is also release 10400mAh power banks. Today we will give some warm tips when you buy power bank online, you should to know three things.

What is a power bank?

A portable power bank is a transportable charger for devices. As we said, smart-phones, tablets, laptops, as well as cameras need power after a while and power outlets are not readily available everywhere we go. So, a power bank is actually an external or additional charger for your phone as well as for other electronic gadgets and devices.

Power banks are charged in 3 ways: a USB computer port, by way of a charger which usually comes with the phone, or by the use of another power bank. As for USB charging, some battery packs have a built in USB capability for charging (mostly newer power banks, not older models), with a cable that comes with the device but which is separate. This, of course, adds to the number of situations which can go wrong in the usage of the power bank, as some people forget or lose their cable and then they cannot use the power banks to charge their smart-phones. But, when the the device is charged in full, then the cable is without difficulty tucked into the power bank. Thus, for the process of charging a device, what is done is the adapter is taken out and plugged into the correct slot. Also, the higher quality battery packs come with connectors for a variety of device sorts, as for example, Apple, Sony Ericsson, LG, Nokia, Huawei, Samsung, and others.

The time for charging depends of the power capacity of the power bank, which is measured in mAh, or milliamp Hour or milli Ampere Hour (a unit which measures electrical power over a certain period of time, usually measuring the capacity of the energy of a battery – the more mAh there are, the better the capacity is). Thus, the great the mAh rating is, the greater the power capacity of the bank. Which leads to the second thing we need to know about power banks:

The power output and the power capacity

The power output of a battery pack is extremely relevant, as a power bank requires a minimum of 2 ampere to charge. So for every power pack which you wish to purchase, its capacity needs to be 2.5 times greater than your phone’s capacity. For instance, if our phone battery is 4,000mAh, we need to purchase a power bank which is 10,000 mAh, as approximately 6,700 mAh is used for charging. This is better than buying the one with the same mAh with your phone.

So basically, it should be noted that if we decide to buy a portable charger, the usage of our phones should be kept in mind. In our time, due to huge demands by consumers, also available are 8,400mAh and 10,400mAh units, and there are chargers which can power up nearly any type of device (including iPads, laptops, iPods, mobile phones from diverse companies, as well as tablets).

For example, here is a list of power bank capacity and charging capacity:

– 1,500mAh battery: smart-phone – one complete charge.
– 5,600mAh battery: smart-phone – two to three and a half complete charges. iPad – about 40%.
– 10,000mAh battery: smart-phone – four complete charges. iPad – 100% complete charge.

Tattu 10400mah power bank the actual capacity is 10800mAh, it can charges the iPhone 6S almost 5-6 times, iPad air2 almost 1-1.5times or iPad mini4 1.5-2 times, and also charge Android smart-phones and other.

The third thing we need to know about power banks is the following:

The price and the quality.

Along with the power capacity or the strength of the battery of the power bank, another item that can help us make rational decisions about purchasing such devices and gadgets (or better said, the chargers for the mentioned) is the price of the power bank. It is par for the course that we should not purchase a portable battery bank which fails to include some basic features such as for example, protection for overcharging, short circuits, as well as for temperature.

So if we are seeking for a portable battery pack or power bank, it is really and truly recommended not to go for the option which is the cheapest. It is not just a saying, but we really get what we pay for, and we can conclude that a mid-range to an upper range price is a great option, without sacrificing quality.

We must conclude that the reason for purchasing a battery pack is that it is a portable charger, thus charging your devices. Sure, there are cheap power banks with allegedly a large capacity, although it is quite possible that they will fail to power up your gadgets suitably or even break down.

And last but not least – a power bank’s brand is very important, and we are all familiar with the dependable brands which are popular by their durability, quality as well as resale value. Even though some of the brands can be quite expensive, at least there is a guarantee that they will be used for quite a while.

Source: http://www.genstattu.com/blog/buy-power-bank-online-what-you-need-to-know/

Gens ace 520mah 2s and 3s Lipo battery for MINI FPV Racing Drones

Tattu GENS ACE 520mah 30C / 60C 2s 7.4v & 3s 11.1V are one of the best quality LIPO that we can buy for mini drones between 70-120 size. GENS ACE also is manufacturing well knowed batteries Tattu which are one of the best on the market like SLS or Bonka. These high class lipo are not a joke, it provides the best power I ever seen, if you never try it then do it & you will never back to old ones.

Box & Store voltage

Gens ACE batteries will come well packed:

Also storage voltage is on great level when we check them out of the box.

They looks delicious

Batteries got ling JST cable and looks really good, this batteries are really good shit because even power cable has extra heat shrink to prevent damage.

Discharge rate & Capacity & Cycles

If Gens Ace / Tattu wrote down that battery got 30/60C then this nuber are true, at some chinese or turnigy batteries we can find 50-100C but in most acses these batteries can’t even reach half of this rate…OK, let’s do some math, to know what is dicharge rate we have to mutiple capacity 520 by discharge rate 30C and the result is 15,600mA

Continous discharge rate is 520mah(0.52A) x 30C = 15600mA (15.6A ), burst is 60c so 31,2A which is Super score because mini drones in most cases can’t take more than 25A .

These batteries are BEAST, I been able to pump in 565mah ! ( from 3.2V to 4.2 ).

Ofcourse this is nothing new because usually in these batteries capacity is higher than showed on label.

Cycle life span should be not less than 200 if you will charge these batteries under 1C, best one will 0,5C.

Size and weight

Weight for 2s GENS ACE 520mah is only 28g which is great score compare to capacity and discharge rate, while 3s GENS ACE 520mah is literally a fat cow ( 44grams ).

Size for 2s is 24x15x45mm & for 3s is 24x22x45mm . Here you can see a size difference:

Usage & flight test

2s GENS ACE 520mah works delicious, drone has good punch but still BOLT battery is mouch powerful to go due to Super high discharge rate 65-130C.

3s GENS ACE 520mah has really great punch BUT is way too heavy. 44grams is too much for small drones so most of extra energy is used to hover and just a bit for a bit more noticable fun. So best choice will be 3s 300mah and at least 45/90c but good luck to find it…. If you still want more power today then buy BOLD batteries from turnigy with Unholy C rating 65-130.

Price

2s and 3s GENS ACE 520mah have different price, if you have interesting in 520mAh 2s lipo and 520mAh 3s lipo battery, you can chick it: http://www.genstattu.com. So as you see price is low compare to quality.

Source: http://www.genstattu.com/blog/gens-ace-520mah-2s-and-3s-lipo-battery-for-mini-fpv-racing-drones/

Top best 12000mAh 12V Jump Starter on genstattu.com

Car jump starters are nothing new. When your car starter problems, storage battery damage or under the condition of cold weather lead to the car can not normal start, the jump starter can solve them. Today recommend a new product and top best jump starter on genstattu.com.

Tattu 12000mAh Jump Starter Specifications:

Power: 400A Peak 12v
Capacity: 12000mAh
Vehicle: 3.5L Gas and 2L Diesel
Input: 15V, 1A
Output: 12V/8A, 5V/1A , 5V/2A
USB Output: 5V – 2A
Charge Mode: CC/CV 15V-1A
Start Current: 270A
Peak Current: 400A

jump starter

Tattu JST1 12000mAh 12V 400A Peak Car Jump Starter Features:

A. Portable Power Supply: Instantly jump start your vehicle (up to 3.5L gas or 2L diesel, 12V engines)

B. 12V/(Max 8A) USB Outputs: The “12V/8A Output” will power your ISDT charger, Notebook, Cigarette lighter (Included) and even portable car accessories like inflators & car refrigerators

C. One Key Storage

D. LED Light: Tattu JST1 has a useful LED Light with three different modes: Normal, Strobe, SOS.

E. Long Standby Time: 3-6 months

F. Smart Safety: Over charging protection, Current overuse protection, Over voltage protection, Over current protection

Compatible vehicles

Cars, Dirt bikes, ATV/ATC, Motorcycles, Trucks, SUVs, Boats, Jet Ski, etc
Compatible Mobile phone: Iphone, Samsung, HTC, Nokia, Motorola, Sony etc.
ISDT, Tablets & Readers, Cell & smallphones, Gopros & Cameras, Handheld Games, GPS and More

If you interesting in Tattu 12000mAh 12v jump starter chick it:
http://www.genstattu.com/tattu-400a-12v-12000mah-jump-starter-power-bank-battery-charger-led.html

How to safety discharge batteries

The batteries make our life more convenient, as the electric power, we should use them safety. Last week, we talk about how to charge lipo battery, from the article you have learned charge lipo battery is not easy thing, we should take more carefully. Today, we will give you some advises about how to discharge batteries.

1. Don’t discharge Batteries at amperage rates higher than specified on Batteries’ labels.

2. Don’t allow the temperature of Batteries to exceed 140°F during discharge. Adequate cooling for Batteries is required, especially when discharging at or near maximum rates.

3. Don’t discharge Batteries to voltage below which they are rated by the manufacturer when measured under load (connected to the vehicle or a charger capable of discharge). Batteries discharged to a voltage lower than the lowest approved voltage may be damaged, resulting in loss of performance and potential fire when Batteries are charged.

4. Don’t discharge battery to a level below 3V per cell under load.

For Tattu series batteries which are used for Unmanned Aircraft System, The recommended cut off voltage is 3.5V per cell.

5.Don’t leave battery unattended during the discharging process. During the discharging process, user should monitor the process constantly and react to potential problem that may occur.

6. In case of emergency, discontinue the process immediately, disconnect the battery, place it in a safe area, and observe it for approximately one hour. This may cause the battery to leak and the reaction with air may cause the chemicals to ignite, resulting in a fire. A safe area should be outside of any building or vehicle and away from any combustible materials. A battery can still ignite even after one hour.

7. User need to check the conditions of the battery before use it or discharge it. Stop using it if user found the cells are not balanced or cells are puffing or weeping.

And finally, don’t over discharge the battery, over discharge the battery maybe let the battery damage or fire, so please take more carefully to discharge batteries

Source: http://www.genstattu.com/blog/how-to-safety-discharge-batteries/

how to charge lipo batteries

When you saw the article title, may be you will laugh: charge lipo battery is so easy. Connect the battery to charger is drone. Is it really easy? Let us to see the professionals give the complete charge lipo battery needing attention.

1. Only use charger designed for lithium polymer/Lion battery. Do not use a NIMH/ NICD/ LIFEPO4/ LEAD ACID charger. If the charger can support different battery types. Be absolutely sure to select the Lithium polymer (Lipo) mode on the charger. Failure to do so may cause a fire, which may result in personal injury and property damage.

2. User should Always charge Batteries in an open area away from flammable materials, liquids and surfaces.

3. Never charge Batteries inside of the model.

4. Never charge batteries below freezing (0°C, 32°F)

5. Never charge Batteries that are hot to the touch (above 100° F). DO NOT handle Batteries until they are cool.

6. User should Always set the charger to the proper cell count and/or voltage listed on Batteries’ labels.

7. User should Always set the charger to the amp charge rate as listed on Batteries’ labels.

The charger should never be set to charge Batteries at a rate greater than 1C (One (1) times the capacity of Batteries in amp hours) unless another C rate is specified in the manufacturer’s product documentation or the rate is preset as part of a specific battery and charger combination. DO NOT alter the charge rate once charging has begun.

8. Never overcharge Batteries beyond the capacity listed on Batteries’ labels.

9. Never overcharge batteries over their rated maximal voltage (4.2V/cell for LiPo).

10. It must choose series charging if two or more battery packs be connected in series for using.

11. Use suitable and good quality chargers, please don’t use cheap and low quality chargers, use the professional Lithium polymer charger to charge the Gens ace & Tattu battery. When charging, please make sure the surroundings is clean, without sundries around. Don’t charge without monitoring. Using lipo sack is suggested when charging to ensure the charging safety. Stop charging timely when the battery is fully charged. Do not connect the charger and the battery for a long time when the battery is fully charged. We will not be responsible for any personal in jury and property lost or any kind accident that caused by improper charging.

source: http://www.genstattu.com/blog/how-to-charge-lipo-batteries/

The type of ESC and Tattu ESC

How many ESC (electronic speed controller) types? Maybe you have been confused by this question. Today we will help you to clearly know more about ESC.

1. ESC types

#1 Brushed and brushless

For base on motor, which can be divided into brushed and brushless. It according to the control signal to adjust the speed of the motor.

For their connection, usually goes like this:
– The ESC input line connected to the battery;
– The output of the ESC line (brushed have two lines, brushless have three lines) connected to the motor;
– ESC signal lines connected to the receiver.

What’s the difference between brushed and brushless ESC?

Brushed Motor and Brushless Motor is like Hub and Switch in Computer Network. Brushed Motor is just a normal motor where it work by direct current/voltage (We only focusing in DC area. NO AC Motor)

#2 Blheli, simonk and kiss firmware

ESC program is divided into open source and not open source, For base on open source firmware, there are 3 main types of firmware that you can get on your ESC, which can be divided into blheli, simonk and kiss firmware.

#3 BEC and UBEC

BEC stands for Battery Elimination Circuit. In practice, this simply means that ESCs with a BEC are able to output a constant voltage and so power the equipment on board your flying platform, such as your receiver, servos or flight controller. Delivers power for your Rx and servos at ~5v (but usually no more than 2A-3A).

UBEC stands for universal BEC or sometimes ultimate BEC, which is typically a switch mode unit which is capable of reducing the voltage from 4s+ packs to the required ~5v, and can deliver as much as 10A to power many, big, digital servos and your Rx.

2. What type of ESC do quadcopters use?

BLHeli is the most common firmware being run on multirotor ESCs today. It’s popularity is pushed further by support for what is called “BLHeli passthrough” built into any CleanFlight based flight controllers. What this allows you to do is to program and update all of your multirotors ESCs from the computer connection to the flight controller.

For BEC or UBEC, you really need to make sure which one you have or are buying if your goal is to have the better switching mode instead of the more problematic linear mode type BEC. Like a lot of things in RC, you have to study the words and numbers a little (types, input voltages, output voltages, ratings, etc.) to make sure you get what you need.

Brushless motors are typically 85 – 90% efficient or more, higher efficiencies for a brushless electric motor, of up to 96.5%, whereas DC motors with brushgear are typically 75 – 80% efficient. Brushless DC motors are commonly used where precise speed control is necessary. So base on the brushless motors, you should have to choose the matching ESC, which also is brushless ESC.

About Tattu 30amp ESC brushless Blheli

Tattu ESC Specifications

– Firmware: BLHeli_S V16.6 A-H-20
– Max continuous load: 30 amps
– Burst Current: 40A / 10sec
– Lipo Cells: 2 to 4 cells
– MCU: SILABS EFM8BB2 48MHz
– BEC: No
– Weight: 3.6g (board) 6.5g (total with wires and connectors)
– PCB size: 26mm L*14.5mm W
– ESC height: 6mm
– Signal wire: 150mm
– Power wire: 100mm

Suppot regular 1-2ms pulse width input, as well as Oneshot125 (125-250us), Oneshot42 (41.7-83.3us), Multshot(5-25us), Dshot150, Dshot 300 and even Dshot600and automatically detected by the ESC. High quality N-FET, half-bridge drive and PCB specialized for cooling, only flashed with BLHeli_S firmware.

Source: http://www.genstattu.com/blog/what-the-type-of-esc/