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Archive for May 27th, 2019

Baofeng Big Battery Capacity

I bought a pair of third-party 3800 mA·h batteries for the Baofeng UV-5RE Plus (whatever that means) radios on our bikes. Oddly, the packs carry the same “Model BL-5” identification as 1800 mA·h batteries shipped with the radio:

Baofeng BL-5 Batteries - 1.8 and 3.8 Ah
Baofeng BL-5 Batteries – 1.8 and 3.8 Ah

The obviously mislabeled “Baofeng” battery eliminator also sported a 3800 mA·h label:

Baofeng Battery Eliminator - overview
Baofeng Battery Eliminator – overview

I conjured a “test fixture” from a clamp, copper sheet, and copper tape snippets:

Baofeng battery - test setup
Baofeng battery – test setup

Which produced interesting results:

Baofeng BL-5 3800 mAh packs - Ah - 2019-05
Baofeng BL-5 3800 mAh packs – Ah – 2019-05

The 250 mA load = 15 hour rate seemed reasonable to simulate radios spending most of their time in power-save mode, but the packs still delivered only 2.8 A·h.

The packs also claim an unnaturally precise 28.12 W·h, but they’re still underperformers at 20 W·h:

Baofeng BL-5 3800 mAh packs - 2019-05
Baofeng BL-5 3800 mAh packs – 2019-05

Anyhow, I can run the radios for a week without (worrying about) running out of juice during a ride.

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