Overview
The 21905 is used with our OBS-5+ system. It allows a user-supplied lithium battery to power the OBS-5+ instead of three C-cell alkaline batteries.Images
Specifications
| Dimensions | 4.78 x 0.97 x 0.97 cm (1.88 x 0.38 x 0.38 in.) |
| Weight | 9.07 g (0.02 lb) |
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