sprokitt
Established
I got a similar aftermarket battery for my M8 on ebay for $16. It took 2+ weeks to get here, but seems to work just fine. No issues with charging or display as far as I can tell. VDC reads the same as the Leica version. Weight is identical given the accuracy of my scale.
Below is where I got mine
http://cgi.ebay.com/z54-Battery-Lei...ies_Chargers&hash=item5193050bb2#ht_632wt_911
Below is where I got mine
http://cgi.ebay.com/z54-Battery-Lei...ies_Chargers&hash=item5193050bb2#ht_632wt_911