Sanyo SY-S1 replacement battery by Amstron is designed for use with the Sanyo S1. This aftermarket battery is rated at 700mAh, and keeps the profile of your S1 cell phone since it doesn't require a larger door cover. Amstron brand batteries are 100% manufacturer compatible with original specifications. • Chemistry: Li-Ion • Rating: 3.7V 700mAh • Warranty: 4 years
