Originally Posted by codprawn
I know what you are saying they are designed for more constant use but there is a world of a difference between a 300 or 400hp diesel in a Nelson and a train engine!!!
Remember a milkfloat or a forklift will draw a heavy current when climbing hills or working hard.
the loco engine wasn't a really big one only a class 08 shunter size , and TLF19 cells are massive! Each cell is the size of a truck battery.
dont forget milkfloats are typically 72 or 96 volts at 400 amps thats 51HP,
My point was that to get the CCA of a decent SLI battery you need a disproportanetley large traction battery, it would probably sink the boat!!
as the voltage goes up the internal resistance of the cell becomes less important because the current drops by the square root of the voltage.
I think typically starting batteries are always short and fat where as traction cells can be 4"x6" x36"tall the length of the cell increases the internal resistance.
whats more i dont care if i never see another one
after 3 years working for Motive Power supplies and LA batteries my back couldn't take lifting another battery of 36X30KG cells. dont miss wearing oxfam terylene trowsers either(cheap and acid proof) your knob would be dangling out of jeans after one battery fitting
It was always amusing seeing the look on peoples faces when you start welding a batery up with the oxyacetylene, especially if they had the old one explode