I picked up a Crown WP2000 (WP2035-45) at a liquidation action, and I'm quite sure the batteries will need replacement in the very near future (like... now, they're date-coded 2010). I can't find information on the battery size and the pallet jack is at my warehouse, I'm wondering if anyone knows off-hand if a Group 27 battery will fit, similar to the WP3000.

Second, I have the serial (5A317829) and I'm wondering if I can use that to determine the age of the unit.

Thanks!