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Topcon, Sokkia equivalent BT-G1, TBB 2, Surveyor Battery

NiCd & NiMH batteries are not interchangeable.

Outline Model Type Capacity Price  Order
Topcon BT-G1, TBB 2 BT-G1
Can also be supplied as NiMH
Comes with it's own free lithium ion battery charger
Lighter and lower self discharge rate compared to NiMH
Not available.
BT-52Q battery CS-TOP520SL
(Replaces BT-52Q, BT-52QA)
NiMH 2700mAh
$14 Shipping

The above batteries will have different model numbers on the product pages since they are after market replacement batteries which are as good or better than the originals.  The current or mAh (milliamp hour) rating of a battery is an indication of the battery capacity or how long it will last on a charge, the higher the better.

T1 year warranty and no questions asked 1 month return policy.

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