Sony Ericsson K750i/W810/W800/Z300/W550 (BST-37) Replacement Battery
The Sony Ericsson BST-37 standard battery is a reliable rechargeable power source designed for classic Sony Ericsson mobile phones. With a typical 900mAh capacity and 3.6V output, it delivers stable daily performance for calls, messaging, and music playback, ensuring dependable backup power for compatible devices.
Specifications
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Model: BST-37
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Type: Li-Polymer (some listings mention Li-ion)
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Capacity: 900mAh (other versions: 600mAh / 650mAh / 750mAh)
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Voltage: 3.6V (some sources list 3.7V)
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Compatibility: K750i, W810, W800, Z300, W550, K600i, K610i, W700i,