Bingo! That's what makes my mods fire-up infrequently too. That CGR-CH is one of the best bats money can buy for our mods... but, as landman correctly opined, it has a folly as well. I've since cut a small piece of electricians tape, in a circle pattern, pasted that on all CGR-CHs and all's fine.
There's one more bat which does it too -- the Samsung INR-20R! Another gr8 bat for us, but has a protruding [nipple type] bottom -- thus, the same story, sticks out and nearly touches the -ve post even in locked position. What I did? Screwed-in the Telescopic +ve Post just that bit so that the battery is tad loose in the mod... not flush-fit as we do otherwise... and done deal!
AW IMR. Recommended since day one of GP.
Q!