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This adapter supports one battery pack at a time and may be daisy-chained with other Safe Parallel Adapters. Designed to support multiple parallel pack, node-plus-discharge (high current) charging applications. Interconnects any 2s to 6s ThunderPower or Polyquest brand battery pack to the Cellpro PowerLab. Multiple, on-board SMT polyfuses (automatic resetting fuses) protect the adapter and charging circuitry from damage from wrong interconnections, reverse polarity, etc.