: If the needle doesn't move left after several hours, the battery may have a shorted cell and cannot hold a full charge.
The Selmar Turbo 4 utilizes a multi-stage charging algorithm: selmar-turbo-4-battery-charger-instructions
: Use only with flooded lead-acid batteries; do not use with non-rechargeable or dry-cell batteries. Ventilation : If the needle doesn't move left after
Note: Confirm exact specs on your unit label or manual; model variations exist. selmar-turbo-4-battery-charger-instructions
: 4 Amps. This is considered a "trickle" or slow charge rate for car batteries, typically taking 12–15 hours to fully charge a flat standard battery.