no the concrete floor can't do anything thru the thick plastic case - not recharging it full after the jump might have contributed tho, batteries do NOT like sitting partially discharged

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature we find it attached to the rest of the world" John Muir
"When we tug a single thing on an old truck, we find it falls off" me
Some TF series details & TF heater pics & Rust-a-holics Unanimous parking lot