Key benefits - Provides safe, automatic battery charging with clear stage transitions based on battery voltage. - Protects against overcharge by stopping charging when the voltage reaches the limit and rechecking periodically. - Supports low voltage protection by starting with a gentle trickle current to preserve battery health. - Simple, deterministic charging process that requires little supervision and adapts to different battery states. How it works 1. When the battery voltage is below 3V, it enters trickle charging mode with a charging current of 100 mA. 2. If the battery voltage is larger than 3V, it enters constant current charging mode and uses the set constant current. 3. After entering constant current mode, charging stops every four minutes to check if the battery voltage is above 4.15V. If the voltage is more than 4.15V, charging stops; otherwise charging continues and is tested again after another four minutes. 4. When the battery is fully charged, if the voltage is found to be lower than 4.1V, turn on the battery preferably. Key features - Function: multi-stage charging with automatic mode switching based on real-time battery voltage; periodic voltage checks during constant current charging; precise termination at the 4.15V threshold. - Compatibility: designed to manage charging for batteries operating within the described voltage ranges (below 3V trickle at 100 mA; above 3V constant current; termination around 4.15V; final check for 4.1V). - Size and material: not specified in the described details; refer to product specifications for physical dimensions and construction. - Performance: reliable protection against overcharge through regular voltage checks; safe transition between trickle and constant current modes; maintains battery health with controlled charging current and termination criteria. Typical use scenarios - Field maintenance: technicians replace or service rechargeable batteries in devices with voltage ranges around 3V to 4.2V, using the charger to safely bring batteries to a full state without risk of overcharge. - Workshop setup: batch charging of multiple batteries that require automatic switching between trickle and constant current modes, ensuring every battery is charged safely and consistently. - Home use: routine charging for everyday rechargeable batteries where a simple, automatic charging sequence helps extend battery life and reduces the need for manual monitoring. Notes - The description specifies a voltage-based charging sequence including a 100 mA trickle mode under 3V, a constant current mode above 3V, periodic 4-minute checks with a 4.15V termination threshold, and a condition for finalizing charging when voltage is below 4.1V after full charge. - Size and material details are not provided here; please consult the product specifications for physical attributes.