Battery systems must be designed to provide two separate electronic protection for overcharge, overdischarge, and overcurrent. Remove the guard plate and charge it. If the battery explodes, it's bad design. Remove the guard plate and charge it. If the battery explodes, it's bad design,YFJ company provide a series of strict test before sending to customer and satisfied after-sales for these Lithium Ion Battery ,Lipo Battery and 18650 Battery Pack includes:
1.these High Power Battery Pack need to be conducted for power charge and discharge for full 2 cycles to make sure of its quality before shipping to customers
2.We will provide placement for free once the battery at the customer's side could not be qualified or faulty
The above models are available in YFJ company
Model:3.7V 9Ah ,...
Model:7.4V-2.2Ah,4.4Ah,6.6Ah,8.8Ah......
Model: 12V - 4Ah, 5Ah, 6Ah, 8Ah, 9Ah, 11Ah, 12Ah, 13Ah, 14Ah, 15A h, 16Ah, 17Ah, 18Ah, 19Ah, 20Ah
Models: 24V -- 4.4Ah, 5Ah, 6.6Ah, 8.8Ah, 9Ah, 11Ah, 13.2Ah, 15.4Ah, 17.6Ah, 19.8Ah, 22Ah, 25Ah, 33Ah
Models: 36V -- 4.4Ah, 5Ah, 6.6Ah, 8.8Ah, 9Ah, 11Ah, 13.2Ah, 15.4Ah, 17.6Ah, 19.8Ah, 22Ah, 25Ah, 33Ah
Model: 48V -- 4.4Ah, 5Ah, 6.6Ah, 8.8Ah, 9Ah, 11Ah
We can also provide OEM/ODM service for customers
7.4V 4.4Ah li ion batteries
| NO. | Items | Specifications |
| 1 | Charge voltage | 8.4V |
| 2 | Nominal voltage | 7.4V (2S2P) |
| 3 | Initial impedance | 150mΩ |
| 4 | Nominal capacity | 4.4Ah |
| 5 | Minimum capacity | 4.2Ah |
| 6 | Charge current | Standard Charging::0.2C5A (0.88A) Rapid charge:0.5C5A C(2.2A) Max |
| 7 | Standard Charging method | 0.88A(0.2C5A) CC(constant current)charge to 8.4V,then CV(constant voltage 8.4V)charge till charge current decline to ≤44mA(≈0.01C5A) |
| 8 | Charging time | Standard Charging:6.5hours(Ref.) Rapid charge: 3.5hours(Ref.) |
| 9 | Max.discharge current | 2.2A(0.5C5A) |
| 10 | Discharge cut-off voltage | 5.5V |
| 11 | Shelf life | 2 years |
| 12 | Cycle life (0.2C5A/0.2C5A) | 500 times,≧80%DOD |
| 13 | Operating temperature | Charging: 0℃~45℃ Discharging:-20℃~+60℃ |
| 14 | Storage temperature | Less than 1 month | -10℃~+45℃ | Percentage of recoverable capacity :85% |
| Less than 6 month | -20℃~+35℃ |
| 15 | Pack Weight | Approx:198g |
| 16 | Pack Dimension | Length: Max68.00 mm Width: Max38.00 mm Thickness1: Max 38.00mm |
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