Battery Chargers
Power Inverters
Powerpacks
Jump Starters
The way to avoid (NiCad) "memory effect" is to fully cycle (fully charge and then fully discharge) your battery at least once every 2 to 3 weeks.
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This is a Duracell Brand Battery for your Quasar VM-565. The Duracell Battery meets or exceeds original manufacturer power specifications for Quasar VM-565 Batteries.