Rolls BT301 Pocket Battery Tester Dot Line DL-2477 1/4"-20 and 3/8" Threads

1/4"-20 and 3/8" Threads

and any other situation where there isn't ample space for adapters

Narrows Beam Angle

Also allows use of existing EdgeHD T-adapters and other Celestron imaging accessories (sold separately)

2 Suede Haul Handles on Ends

Rolls BT301 Pocket Battery Tester Dot Line DL-2477 1/4"-20 and 3/8" ThreadsBudget Friendly Tester Analog Meter Tests 'AA', 'AAA', 'C', 'D', 9V & Coin The Rolls BT301 Pocket Battery Tester is an easy to use, budget friendly way to test many commonly used batteries. The tester's analog meter will tell you if the battery needs to be replaced or charged, or if it still has life left in it. Compatible batteries include: 'AA', 'AAA', 'C', 'D', 9V, and small coin cell batteries. Budget friendly Easy to read analog meter Tests 'AA',