When I read "a few charges", I tend to think in terms of a handful or so.
However, this morning I ran across a crumbly Peon's Strength/606 item with 'a few', and it ran to 15 or 16. (I just burned them all, spread across a couple of characters, to max out the duration and not have to carry it around.)
Do we have any intimation--or firm knowledge?--that the charge descriptors on magic items' # of charges are/are not the same as for Enhancives' number of charges?