Topcon Compatible BT 52Q NiMH Battery for Topcon  Total Stations Equivalent to Topcon BT-52QA battery Rechargeable, 7.2 Volts Compatible with Topcon GTS-210, GTS-220, GTS-230W, GRS-245NW, GPT-1000, GPT-2000, GPT-3000W, GPT-3100W, GPT-3200, CTS-3000 total stations 2700 mAh capacity