ML2032 (3.0V) vs LIR2032 (3.7V) Button Battery Chargers: CMOS Motherboard & Solar Watch Charging Guide

In the rechargeable coin cell ecosystem, ML2032 (Manganese Lithium rechargeable, 3.0V) and LIR2032 (Lithium-ion rechargeable, 3.7V) share nearly identical physical dimensions, but their electrochemical voltage platforms and charging requirements differ significantly.

---

1. Core Differences Between ML2032 and LIR2032

| Specification | ML2032 (Manganese Rechargeable) | LIR2032 (Li-ion Rechargeable) | |---|---|---| | Nominal Voltage | 3.0V | 3.6V - 3.7V | | Max Charge Voltage Cutoff | 3.30V ± 0.05V | 4.20V ± 0.05V | | Typical Capacity | ~65mAh | ~45mAh - 50mAh | | Primary Applications | Solar Watches (Casio), Motherboard CMOS, PLC Backup | Apple AirTags, Car Key Fobs, Remotes |

---

2. Charger Compatibility Guidelines

LIR2032 requires a 4.2V max cutoff profile;

ML2032 must NEVER exceed 3.3V charging cutoff! Using a 4.2V charger on ML2032 will degrade cell chemistry.

VSZAPOWER Intelligent Charger Docks incorporate multi-chemistry voltage regulation chips, ensuring complete safety across all battery models.