Flight delays, power outages, extended trips. You can't always recharge your HTC EVO 4G when you'd like to. But with an extra battery on hand, you can always talk, type and work as long as you need to. Keep it in your bag or briefcase and you'll stay connected, powered up and ready to get the job done. This Lithium Ion battery is specially designed original OEM accessory manufactured by HTC. The Lithium Ion technology delivers long lasting talk times, standby time and rechargeable with no memory effect. This 1300 mAh standard battery is great to have as a replacement or an extra battery for your HTC EVO 4G.