SCUD&reg;(code:1399, Hong Kong Stock) 1400mAh BD42100 Li-ion Cell Phone Batteries for HTC My Touch 4G; S610d; Merge; Thunderbolt 4G 100% true capacity, no trick High capacity battery extends the standby time and talk time. Dual IC protection design ensures the safety and extends the battery's life cycle. Environment-friendly materials minimize the contamination. Meet CE FCC Rohs certification