V-Tap is a D-tap/P-Tap (same thing) voltage meter that fits into D-tap ports of your V-mount or Gold/AB of your battery or battery plate. Regardless of if your battery has a battery meter or not, this handy meter will give you live battery status as long as it is plugged in
Volt meter: 16.4v -16.8v is a fresh fully charged battery 100% (note most batteries labeled 14.4V are actually 16V -16.8v) 14v is 50% 12.5 is 25% 11.5 is when you need to swap batteries and is about 10%. Komodo will shut down at 11.1V