Specifically for the T-Rex and T-Rex Pro series, these lithium-polymer batteries are rated for approximately 400 to 500 charge cycles. Replacement Kits with Tools
Tailored for model SM-R815U, this package provides the lithium-ion battery and repair tools needed to restore usage time. Generic or DIY Options smart watch battery buy
of your smartwatch (usually found on the back casing) so I can find the exact battery part you need? Sony SmartWatch 3 Battery Replacement Kit - Extended Life Specifically for the T-Rex and T-Rex Pro series,