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Canon NB 4L Digital IXUS 100 IS Digital IXUS 110 IS 3.7V/760mAh Camcorder Battery - BatteryPack
Building A USB-C Charger For Canon NB-4L Batteries | Hackaday
Canon NB-4L Rechargeable battery for Canon PowerShot digital cameras at Crutchfield
CANON NB-4L 3.7V 760mAh Li-ion Lithium Battery Pack with case & CB-2LVE Charger £10.50 - PicClick UK