This is a set of Traxxas LiPo Battery Charge Indicator Plug Set. The set includes four Green, four Blue, and four Grey indicator plugs. Use these plugs to know which batteries are fully charged, discharged, or in storage charge, and to protect the battery terminals during transportation.
Traxxas Battery Charge Indicator Plugs make it easy to manage the charge status of your batteries. Use green for fully charged batteries, blue for LiPos that are charged for storage, and grey to indicate discharged batteries. These plugs also help protect the battery plug terminals from accumulating dirt, corrosion, or foreign material during storage and transport.