Involvement:Expert (understands the inner workings) - Ownership:1 week to 1 month
Reasonable milliamperage though nowhere close to the advertised "5000mAh"! I mainly ordered them so my high power flashlights would, hopefully, last longer.
Over priced, in my opinion, with suspect build quality. Advertised amperage is over-optimistic. Shrink wrap quality is not good; the wrap on 2 out of 4 batteries split open at the negative pole allowing the protection circuits to hang down loose.
Buy them only if you're into gadgetry or they're on your must-have list, else go with regular 18650's or try some of the other brands.
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