Professional Disc Type Battery Hydrometer

Thexton Charg-Chek® Battery Tester THX117

• Full size specific gravity tester is accurate, easy to use in all temperatures
• Number of floating discs show state of charge
• Specific gravity levels are printed on the tough, see-through plastic body
• Has one-piece rubber bulb, neoprene tip

This is for checking the state of charge of a battery. The large 16-1/4" professional disc-type tester is accurate down to -40 degree F. It's easy to read and safe to use!