This is an exact replacement for the original PSV1000 battery. This is NOT one of those battery packs that stick out of the back of the PSV1000. It fits right in the battery slot, and you cover it with the battery cover.
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Voltage: 3.7V
Capacity: 2210mAh
Rechargeable and no memory effect.
If you do not need tracking number, there is $2-3 discount.