I got a Coleman camping lantern a year ago, and it no longer works on the rechargable battery. It will with alkaline D cells. When recharging, the green LED quickly comes on, and voltmeter shows just over 7 volts. When the charger is unplugged, it rapidly drops to
3.7 volts. This happened with both 240 V and car 12 V chargers. So I deduce the SLA battery is fuggered. I have lost the receipt, so looked up cost of a replacement part. Coleman only sell the battery in a package with both chargers, costing $39.99 Hence Coleman have lost me as a customer.Now the user instructions have a page on disposing of the battery. It tells user to prise the battery pack open with a screwdriver and disconnect the red and black wires, then take battery to recycling depot. Like who is going to do that? I thought perhaps I can get a matching SLA battery from Jaycar. The thing is ultrasonic welded. I tried 3 different small screwdrivers and can't open it without major damage.