portable battery packs-anyone use these

[strupgolf]

Having done some electrical work on my car lately, my battery went dead. My kids gave me a portable battery unit, the kind you can use to start things, for a gift. My question is this, is there anything I need to know before I use it to "jump start" my 86 911, and if so, dangers in using one of these? Thanks for any replay.

[Rot 911]

Just make sure you hook the leads up correctly!

[RickM]

Should be the same as a regular jump start.

FYI on these battery packs, once they lose their charge they may not come back. The built-in electronics will not allow a charge if they get too low (I'm on my second one). Keep it topped off according to the instructions.

[randywebb]

trick by putting agood battery in parallel while you re-charge it
- ya gotta be smarter than whatever intelligence is built in to the machine...

[Jack Olsen]

You can also use them to run the beacon for a lap timer at the track.

[strupgolf]

Thanks guys. It sounds like it should be straightforward. I'll recharge it after I use it and keep it up to snuff.

[911pcars]

Some Porsche alternators tend to be on the sensitive side; they don't like to be asked to produce a lot of recharging current.

Better to trickle charge the battery before running it.

Sherwood