PDA

View Full Version : Portable battery capacity confusion



terahammer
04-23-2014, 05:47 AM
Well my post in the normal misc page disappeared within a minute.
I guess I'll post in the appropriate page.

I just came by an interesting question about portable battery packs.

This one product is advertising at 10400mAh at 3.7V with 38.5Wh capacity.

However the product outputs at 5V.

Therefore with the 38.5Wh battery at 5V output, wouldn't the overall capacity be 7700mAh?

Why quote the capacity at 3.7V when you output at 5V?


Enlighten me please.