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BT-C3400 V3.1 Battery Charger Analyzer Li-ion NiMH 18650 AA AAA Car Adapter
Brand: OPUS
$49.94 USD
Li-ion sizes: 10440, 14500, 14650, RCR123A (17340), 17500, 17670, 18350, 18500, 18650, 19670 (protected 18650), 25500, 26500, 26650. What happened??. Most likely one bad battery in the set. Now you can test those batteries for actual capacity.
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