Jiangxi Zhuokai New Energy Technology Co., Ltd.
Jiangxi Zhuokai New Energy Technology Co., Ltd. is a research, development, and manufacturing enterprise based in Jiangxi, China. We specialize in providing a wide range of products, including
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21700 4000mah Cylindrical Li-Ion Battery Cell For For E-Bike Ev
21700 batteryProduct parameters:18650 li-ion rechargeable battery voltage, 3.6V capacity:8800MAH *No memory effect, recharge up to 1000 cycles *Quality guarantee a year brand new Package included:8x21700 li-ion rechargeable battery Suitable for Used in all kinds of electric tools.
Dear friends:
Thank you for purchasing our products.
It’s probably essential to consider when selecting a High Rate 21700 Li-ion Battery. You need to know how much current the device you are trying to power requires before choosing your high Rate 21700 Li-ion Battery. If you select a 21700 Li-ion Battery with a current rating more minor than what you need, you will notice the High Rate 21700 Li-ion Battery overheating as it is working beyond its ability to keep up. You should also know two terms that are discussed in the high Rate 21700 Li-ion Batterycurrent ratings. Those terms are continuous discharge rating (CDR) and pulse discharge rating (Pulse).
*** 21700 Battery Care Tips ***
- Never fully discharge a Li-Ion battery (less than 2.5V load).
- Fully charge to 4.2V before first use.
- Never forcefully install (insert) the Li-ion battery.
- Do not use old and new batteries at the same time.
- Use only a top-notch battery charger.
- Do not expose to warm environment. Try not to short (connect) the positive (top) and negative (bottom) battery terminals (contacts).
| Type | 21700-4000mAh | |
| 40EB | ||
| Rated capacity(mAh) | 4000 @0.2C | |
| Minimum capacity(mAh) | 4000 @0.2C | |
| Rated voltage(V) | 3.6 | |
| Rated current(mA) | Charge | 2000 |
| Discharge | 4000 | |
| Max. current (mA) | Charge | 4000 |
| Discharge | 120000 | |
| AC internal resistance (mΩ) | ≤25 | |
| Weight (g) | ≤71 | |
| Applications | Electric cars/electric bicycles | |
| Cycling performance | 90%@800 or80%@15000.5C/1C,4.2-2.75V | |
FQA:
1. What cells are bigger than 18650?
21700 batteries are slightly larger than 18650 batteries. Both come in flat top and button top forms. However, one is smaller than the other. Being that the 21700 battery is slightly larger, it will also provide more energy/power and runtime.
2. Does parallel increase voltage?
Connecting a battery in parallel is when you connect two or more batteries together to increase the amp-hour capacity. With a parallel battery connection the capacity will increase, however the battery voltage will remain the same.
3. Are 21700 battery rechargeable?
The 21700 battery is a rechargeable lithium-ion cylindrical cell defined by its 21mm x 70mm dimensions. The 21700 is a fast-growing battery size as modern flashlights and other high-drain devices require increased battery capacities for extended runtimes.
4. What is the real capacity of 21700?
21700 – were designed to be a larger and higher capacity replacement for 18650 batteries. Like the 18650, the 21700 has a nominal voltage of 3.6/3.7V. The 21700 was designed to replace the 18650 in EV battery packs. The capacity of these batteries ranges from about 4,000 to 5,000 mAh.