Camelion BT315 Battery? 

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Cluster Cluster 3
Part Number BP2958
Battery Type AA
Brand Camelion
Features

Int. Frame size to IEC:LR6
Frame size:AA
Dimensions (?? x L mm):14,1 x 49,8
Weight (g):24,0
Electrochemical System:Alkali manganese dioxide
Nominal Capacity2700mAh to 0,8V
(rated capacity at 25mA
continuous drain)
Nominal Voltage:1,5V
Jacket:Aluminiumfoil