Camelion BT330 Battery? 

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Cluster Cluster 3
Part Number BP1696
Battery Type CR
Brand Camelion
Features

Frame size:CR2025
Dimensions:20,0 x 2,5
Weight:2,5
Nominal Capacity:150mAh to 2V
(20?° ?± 2?° Crated capacita at 15k?©
continuous drain)