Preventing Reverse Current from 18650 Battery Pack to Charger Without Reducing Amps

The discussion addresses preventing reverse current flow from an 18650 battery pack back into the charger during charging without reducing the charger's current capacity. The primary technical solution recommended is using a P-channel MOSFET with a very low RDS(on) to act as an ideal diode, minimizing voltage drop and power dissipation. Diodes, while simpler and inherently blocking reverse current, introduce a forward voltage drop (typically 0.6 to 0.8 V) that can interfere with charger operation by requiring higher voltage to fully charge the battery. Load switches are also mentioned as an alternative method. The P-channel MOSFET solution requires careful selection of devices with appropriate current and voltage ratings and may need additional circuitry to control switching. The concept of an "ideal diode" circuit is emphasized to achieve efficient reverse current blocking without compromising charging current. Additional unrelated posts were present but not relevant to the technical discussion.
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