Get up to 50% extra battery life from your micro USB (Universal Serial Bus) Charger based products. Never be without power! Compatible with: Acer: Liquid Metal Dell: Venue Pro Google: Nexus S HTC: Gratia, HD7, Mozart, Trophy JCB: Pro Talk TP851, Sitemaster TP802, Tradesman TP121 LG: Optimus 7, Optimus 7Q Samsung: B3310, B3410, B5310 Corby PRO, B5722, B7620 Giorgio Armani, B7722, Beam I85