12v 12ah AGM lead acid charging

[myzter]

I've read here(forums) Hawker lead acid AGM battery can be deep discharged, and re-charged really fast with alot of current.

Would using a
Power Adapter: 12 Volt 2.5 Amp work to charge this type of battery ?
ebay:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=220201827286
or better yet ... a higher amp output
12 Volt 6 Amp (12V 6A) DC Supply
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=220201824768

I somewhat understand that it really is not the ideal charger, but for a very short timed, 50%+ re-charge....
maybe under <15 min for on the road circumstances would something like this actually work ?

##
If this is possible, it would be a secondary charge port, connected to each 12v cell seperately. The main charge port is the XLR or 3-prongconnector for a escooter charger which charges both cells as usual.

/// ideas or suggestions are all welcomed to this approach

 

[Anonymous]

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[myzter]

Alright, yes I know of the lead acid chargers, and more amps is faster charging with them. But they look too large and heavy to be ultra portable solution. I think the 2-4 amp escooter chargers are rated for 2-3 hour quick 100% charge. Im only concerned with a fast 25%+ charge.

The object of my post was to gain insight into a solution which offers these benefits for charging 12volt 12ah AGM lead acid battery:

1. small and fits into a pocket
2. I live in Vancouver, Canada - ac plugs can be found at some skytrain stations. If my ebike battery has almost lost 80-90% power or is starting to show big drop in power, I still need to ride right, riding the train from across the city, I could just plug in for several minutes at the skytrain station closest to my home/work, and while I charge/wait and check my email on my smartphone.

This device which im looking into etc..
80 Watt 12-volt 6.67 amp ac adapter
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=180272620611

 

[dak664]

If the batteries have a warranty it would be prudent to go with the manufacturer's specifications. For 12AH Werker WKA12-12F2 maximum charge current is 0.3C or 3.6 amps, at 32F to 104F. Recommended charge current/voltage is <2 amps/13.7 volts float use, <3.5 amps/14.7 volts cycle use.

 

[fechter]

It may be hard to predict without testing one. As long as the voltage is in the right range and the current limiter plays nice, it would work fine. For a 12 SLA battery, I'd recommend somewhere around 14.5 to 15v.
12v is not enough to charge a 12v battery.

 

[dogman dan]

2 or 3 amps is going to take hours to charge. To get 25% charge you still need to wait about an hour and a half. Still, some charging is better than no charging. And yes it will need more than 12 v to charge. If your use of it is that short, higher amps than 2 or 3 can be done but I wouldn't go past 4 for more than a few minuites.

 

[myzter]

So would a short 2-3 min increment @
12v (13.1) charging with 6amps every 5min
be faster than a 2-4amp continuous charge ?