a pair of black used rechargeable lithium ion batteries

abrasion abrasions amp ampere amperes amps backdrop background batteries battery black bloat bloated capacities capacity changeable charge charger charges charging current cycle damage damaged damages dead discharge discharged dual duo dying electrical electronic electronics full fully input ion isolated lifespan lithium mobile module modules negative output over overcharge overcharged owned pack pair phone phones polarity positive power powered pre recharge rechargeable removable scratch scratched smartphone surface surfaces terminal terminals trickle twin two unit units used volt voltage volts white worn