If this video helps you can buy @fixed1t a coffee [ Ссылка ]. Thx. For more details fixed1t's work with the Nexus 7 and its eBay parts:
[ Ссылка ]
This video showing how I Installed A Long Lead Wifi Nexus 7 Battery In A Nexus 7 3G which uses the shorter backward lead battery. The 3G batteries like the 3G machine are mall in number with the Wifi Battery being more easily available,
