Crestron TSR-310-BTP Replacement Battery 3.8V 2000mAh

Crestron TSR-310 Handheld Touch Screen Remote — 3.8V Li-Polymer Replacement Battery (TSR-310-BTP)

This 3.8V, 2000mAh lithium-polymer battery replaces the original pack in the Crestron TSR-310 handheld touchscreen remote. The TSR-310 is used in Crestron home automation and commercial AV systems to control lighting, climate, audio, and video. OEM part numbers TSR-310-BTP and 6508588 both cross-reference this cell.

• TSR-310 fitment: The TSR-310 uses a slim Li-polymer pouch cell tied to a proprietary battery tray with a connector keyed to the remote's BMS. Voltage must sit at 3.8V nominal — the remote's charge management circuit will reject cells outside that spec and the touchscreen won't initialise.
• Bench tested on actual hardware: We ran this cell through charge cycles on a TSR-310 unit. The BMS accepted the cell without fault codes, the touchscreen powered up cleanly, and wireless communication with the Crestron processor re-established on first sync.
• Connector seating on the TSR-310: The battery connector on this remote sits inside a recessed tray. Press the connector fully until it clicks — a half-seated connector causes intermittent power loss that looks like a dead battery but isn't.

Why the TSR-310 touchscreen goes blank mid-use before the battery is fully discharged

Li-polymer cells in touch remotes don't fail linearly. As the cell ages, internal resistance rises and voltage sags sharply under the display backlight load, even when resting voltage looks acceptable. The TSR-310's BMS triggers a shutdown at around 3.2V to protect the cell — so the screen cuts out while the battery still shows a partial charge indicator. A new cell with lower internal resistance holds voltage above that cutoff threshold for far longer. If blank-screen shutdowns start happening frequently, the cell has crossed into replacement territory.

TSR-310 not responding after battery swap

The most common cause is an unseated connector rather than a faulty cell. Remove the battery, reseat the connector with firm even pressure, and confirm it clicks into the housing. If the remote still won't power on, check that the replacement cell is reading at or above 3.6V with a multimeter before installation — cells that shipped in a deeply discharged state may need a 15-minute charge in the remote before the BMS wakes up and the display initialises.