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Test/Review of UltraFire TR18650 5000mAh (Blue) | Candle Power Flashlight Forum
UltraFire BRC 3000mAh 3.7V 18650 Battery With pcb(1 Pair)
UltraFire 5000mAh 3.7V 21700 Rechargeable Lithium Battery With Protect
PSA: This is why you should avoid Ultrafire and sketchy Chinese batteries. There's no protection circuit, despite their claim, and their advertised capacity is 9 times what they're capable of. : r/flashlight
Test/Review of UltraFire BRC18650 4000 mAh (Brown-Gold) | Candle Power Flashlight Forum