Well an update on this, here goes. I saw another web site from the US that mentioned the 10% rule - ie don't go over 10% of the amp hour rating for charging sealed batteries - so as my jumpstarter is rated at 38Ah I did as intrade suggested and bought a smart charger. It's 3600ma and cost $80 so pretty reasonable. I have now recharged the jumpstarter a good 20 times, it gives around 6 hours power to the laptop before the low-charge buzzer goes. Fully charged it meters at 13.20v and when showing low it reads 12.59v.
I'm chuffed with this, and don't think my treatment will kill it in a hurry because I don't reckon I'm actually deep-cycling it
intrade,
Jan 27, 3:25am
no your not i am running my jumstarter on my camper as we speake for its lights will just recharge it when i drive off tomorrow as it dont uses mutch on 1 fluro light i would think-
sas777,
Dec 10, 6:11pm
I've bought one of those jumpstarters for out here in Oz, good insurance I reckon. It's 38AH and a claimed 1900amp output. When on an unpowered campsite I use it for the laptop, only trouble is, the charger it came with is only 800ma. It takes forever to recharge.
2 questions: what is the maximum safe recharge rate if I buy a standard charger and just connect up to the battery clamps! And will continually deep-cycling this thing quickly ruin it!
hopie,
Dec 10, 6:41pm
I alway thought you left the jump pack kit on the battery to recharge it after you use it.
rob_man,
Dec 10, 6:53pm
I usually leave mine connected to the car for a few minutes after starting to put back what I've used. You can plug into the lighter outlet of your car if you have the right lead.
the-lada-dude,
Dec 10, 7:00pm
what are you going to charge it with!a salt and batteryhehehe
I think these have capacitors and not batteries, not sure
intrade,
Dec 10, 7:05pm
use a electronic smart charger that can charge sla seald lead acid battery and it will charge fine thru the jumpers. i charge my one like that fro a supercheap auto smart charger.
sas777,
Dec 10, 7:06pm
Still have both 12v and 240v chargers but both of them take ages.
Connecting to the car battery for a few minutes is a good idea, been reading up on these sealed units, they can overheat easily but a few minutes shouldn't hurt. Don't know if unit contains capacitors, I'll google it
sas777,
Dec 10, 7:09pm
Ah, thanks intrade, I was after something like this. One American website said you can recharge a sealed battery at up to 10% of its AH but no higher. I would like to confirm this though.
a18a,
Dec 10, 7:20pm
BA-DUM TSSSSSSSSSSS
jmma,
Nov 6, 2:54pm
Bright spark (o:
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