Duralast Jump Starter Manual !!LINK!!
Demarcus Smith
7. After the engine starts, unplug the battery clamps from the jump starter socket and then disconnect the black clamp (-) and the red clamp (-F), in that order.8. Recharge the unit as soon as possible after each use.7.2 CHARGING A MOBILE DEVICE, USING THE USB PORTS
There is a battery inside which may need to be replaced. To check, run the compressor (it runs off
the battery) - if the compressor dies quickly, then the battery has failed to charge and would
need to be replaced. You may want to check your Warranty Management software (or
shoebox) to see if your Starter/Air Compressor is still under warranty - if so, replace it.
Duralast products are carried exclusively by AutoZone, Inc.
The Duralast web site: www.duralastparts.com is useless - it only shows automotive parts,
and I cannot find the product at www.autozone.com, so it seems that AutoZone fails to support this
product with replacement batteries or other replacement parts (or even an online Users manual).