This handy little device connects to your Battery Tender Jr or Optimate 3 battery leads.
You leave it installed on the bike and when the battery voltage drops to a point where you need to charge it, it flashes. No need to guess on if your battery is good before you leave on a long ride ever again!
Plus you don't need to remove it to plug in your charger as you just plug that into the opposite end.
- Choose between AGM/GEL for maintenance free batteries or standard/wet cell for conventional batteries.
- Does not work with lithium high-performance batteries