New! Cool Item... Expert’s Battery Voltage Indicator takes the guesswork out of wondering if your receiver pack inside the boat needs to be charged. Tiny led indicates battery output as green, yellow, or red. Click details for more.

Cool Item... Same as 4.8 but in 6 volts.  Expert’s Battery Voltage Indicator takes the guesswork out of wondering if your receiver pack inside the boat needs to be charged. Tiny led indicates battery output as green, yellow, or red. Click details for more.

HIGHLY RECOMMENDED! A MUST HAVE FOR ALL!
The Sentry will display your battery condition in two ways--voltage under load and capacity--in the form of an easy to read bar graph. Other battery testers tell you what the voltage is of your pack... but this tester tells you the capacity left at that voltage.  Very cool!  It’s compatible with Li-Po, Ni-MH and Ni-Cd packs. Large or small capacity receiver packs are no problem, The Sentry can handle voltages of up to 20 volts which covers all of them. Just plug it in, select your battery configuration (type and cell count) and push start. The meter has reverse polarity protection in case you accidentally plug it in backwards.