S-82x Battery Protection Supervisory Circuits ABLIC S-82x Battery Protection Supervisory Circuits are protection ICs for lithium-ion and lithium polymer rechargeable batteries, including high-accuracy voltage detection circuits and delay circuits. Designed for 2-serial-cell packs, the S-82x ICs protect against overcharge, over-discharge, and overcurrent. These components provide high-accuracy overcurrent protection with less impact from temperature changes.