免费电池续航计算器
根据电池容量和负载电流计算电池使用时间。
mAh
mA
%
Battery Life
11.3 hours
Battery Life (days)0.47 days
Usable Energy (at 3.7 V)6.29 Wh
Battery Life vs Battery Capacity
公式
## Battery Life Estimation ### Formula **Life (hours) = Capacity (mAh) x Efficiency / Load (mA)** Efficiency accounts for losses from the battery internal resistance, DC-DC conversion, and temperature effects. Typical Li-ion efficiency is 80-90%.
计算示例
2000 mAh battery, 150 mA load, 85% efficiency.
- 01Usable capacity = 2000 x 0.85 = 1700 mAh
- 02Life = 1700 / 150 = 11.3 hours
- 03Life in days = 11.3 / 24 = 0.47 days
常见问题
Why not 100% efficiency?
Internal resistance, voltage regulator losses, and self-discharge reduce usable capacity. Real-world efficiency is typically 80-90%.
Does discharge rate affect capacity?
Yes. Higher discharge rates reduce effective capacity due to Peukert effect, especially in lead-acid batteries.
How do I measure actual load current?
Use a multimeter in series or a USB power meter. Average the current over a typical usage cycle.
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