Ansmann 2CR5

Just opened them for my camera flash and got consistent power without any drop-off during a full shoot. Much better than the last generic ones I tried that died mid-session.

I use these in my laser rangefinder and they last noticeably longer than cheaper alternatives. The 6V lithium holds steady power until the very end.

My old battery kept dying mid-shoot, but this 6V lithium one holds power reliably for hours. The packaging was sealed tight, so I know it’s fresh and ready to use.