For battery cells, review the product description for real-world current recommendations, testing notes, and application guidance. Manufacturer maximum ratings should be treated as limits, not the best target for long-term pack health.
Description
FEB 21700G 6500mAh Battery Cell
Low Current Cell High Capacity Cell 13A max current basisBest when runtime is the priority and each cell stays within the datasheet current rating.
Quick Cell Guide
Power level:
Low Current Cell
Low Current Cell
Runtime level:
6500 mAh / 3.6V
6500 mAh / 3.6V
Best use:
Best when runtime is the priority and each cell stays within the datasheet current rating.
Best when runtime is the priority and each cell stays within the datasheet current rating.
Important:
Design with current headroom. Do not build at the edge of the datasheet rating without checking heat, BMS limits, and current sharing.
Design with current headroom. Do not build at the edge of the datasheet rating without checking heat, BMS limits, and current sharing.
Tested by BatteryRealData
BatteryRealData link will be added when public tests are available.
Specifications
| Brand | FEB |
| Model | 21700G |
| Size / Format | 21700 cylindrical cell |
| Chemistry | Li-ion |
| Rated Capacity | 6500 mAh |
| Nominal Voltage | 3.6V |
| Maximum Charge Voltage | 4.2V |
| Discharge Cutoff Voltage | 2.5V |
| Maximum Charge Current | 4.55A Max (0.7C) |
| Maximum Discharge Current | 13A Continuous |
| Internal Resistance | ≤25mΩ |
| Weight | 75g |
| Dimensions | Diameter 21.65+/-0.2 mm; height 70.95+/-0.2 mm |
| Cycle Life | 500 cycles >=70% of first-cycle capacity. |
Safety Warning
Use only in properly designed battery packs with correct BMS protection, insulation, fusing, current sharing, and thermal management. These are unprotected lithium-ion cells for experienced builders.
Manufacturer maximum ratings are limits, not automatic DIY500AMP recommendations for long-term pack design.
Orders ship from Florida when inventory is available. Lithium-ion cells require proper handling, protected packs, correct chargers, and safe storage. Do not solder directly to battery terminals.
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