Possible without voiding the warranty?
(Kalkhoff Pro Connect Alfine 8G 2014 if that helps anyone...)
(Kalkhoff Pro Connect Alfine 8G 2014 if that helps anyone...)
I've got a version around a 5000mAh and it's totally handy. (Actually the one you linked to looks like a bargain!).Stick one of these in your pocket. It's a lot easier.
http://www.ebay.co.uk/itm/12000mAh-Portable-Power-Bank-Backup-Pack-USB-Battery-Charger-For-iPhone-5S-iPad-/151601706561?pt=LH_DefaultDomain_3&hash=item234c2a7641