Efest 18650 4000mAh 10A Flat Top Battery | 2-Pack

Suitable Uses
For low-current flashlights and portable task lighting that prioritize the longest runtime, explicitly accept replaceable flat-top 18650 cells, and whose current demand fits the manufacturer's confirmed rating and remains clearly below 10A. At 4000mAh this is our highest-capacity model, intended for low-current, long-duration use; do not use in devices drawing near or above 10A. It does not guarantee compatibility or brighter output.

Not Suitable For

• Devices or modes requiring more than the confirmed 10A continuous capability.
• High-drain or high-output devices; do not use above 10A.
• Equipment requiring button-top cells, another size or voltage, or proprietary battery packs.
• Devices requiring protected cells unless this model's protection status is confirmed.

Safety Notes
Check the current battery specifications and device manual, including high-output mode requirements. Use cases are not model-specific compatibility guarantees; pulse conditions are unspecified. Use a compatible charger. Never short-circuit or carry loose with metal objects. Stop using cells with torn wraps, leakage or unusual heat. Store cells individually in cases, away from heat; follow matched-cell requirements.