I suggest that once the battery is full, leave it alone about a full day, check again for the voltage and then run an equalizing charge. That is, give a brief shock of voltage and current so as to equalize the charge in all cells (3 in your case). Check in the manufacturer's web page if there is info about how to do it.
I know how to equalize but I read AGM batteries cant be equalized the same way as flooded/wet SLA batteries.
the closest I can get is to keep it at 15v with limited current for a few hours. that should be able to slowly equalize it without the gas escaping much.
the manufacture has nothing about desulfating or equalization because its an no name brand battery. (generic brand that only cells batteries to another company that comes already inside a product)
the closest I can get is to keep it at 15v with limited current for a few hours. that should be able to slowly equalize it without the gas escaping much.
the manufacture has nothing about desulfating or equalization because its an no name brand battery. (generic brand that only cells batteries to another company that comes already inside a product)
Have a look at the pdf in post #8 here:
Charging/maintaining 18v of SLA battery with 20v laptop PSU?
Charging/maintaining 18v of SLA battery with 20v laptop PSU?
close to 3 or 4 amp hours put into the battery now! 😀
should be fully charged up in an hour or so!
voltage is climbing a little faster now. 6.823
should be fully charged up in an hour or so!
voltage is climbing a little faster now. 6.823
Last edited:
Now the voltage is over 7v!! its getting close to full now. battery charger says 3027mAh put into the battery so far! thats a good recovered capacity! very usable! And its not even finished charging yet. it'll likely get over 4 amp hours of capacity thats not bad considering how dead it was
edit: a while later and the current is starting to drop. i see 0.9A on the battery charger when it was at 1.0A before. its getting even closer to full now. so excited cant wait.
edit: a while later and the current is starting to drop. i see 0.9A on the battery charger when it was at 1.0A before. its getting even closer to full now. so excited cant wait.
Last edited:
The way to test the battery when you think its fully charged is to let it run your 6 volt 0.5A bulb and monitor the voltage. It should hold up above 5.9 volts for around 5 hours if the battery was 100%.
I charged the battery up fully and just let it sit overnight resting and checked the voltage this morning
its holding strong at 6.623!
when running a half an amp load it barely drops 0.1 of a volt after a minute of being on. and settles down around 6.48v
when i took it off after 5 minutes the voltage sprang up to 6.54v
it seems to work pretty fully
its holding strong at 6.623!
when running a half an amp load it barely drops 0.1 of a volt after a minute of being on. and settles down around 6.48v
when i took it off after 5 minutes the voltage sprang up to 6.54v
it seems to work pretty fully
Usually well below the Ohm. Now, I suggest to discharge severely it (Not to the non-returning-point) but a deep discharge and recharge again, so you can check if no duration damage has occurred.
so down to 5.25v for 6v SLA AGM?
should it be down to 5.25v while under a load? or open circuit voltage?
should it be down to 5.25v while under a load? or open circuit voltage?
Under load. Put a VOM in parallel, discharge it trough a known resistance so as to let discharge to this voltage in about 10 hours. Usually rates for battery are at 10 hours discharge. Then, you can do math and reckon the battery capacity.
I can just set my smart charger to discharge cycle and set to to cut off at 5.25v and discharge at up to 2 amps. and it will tell me how much capacity the battery has and how long it took.
but i'll discharge at 0.5A so its more accurate.
but i'll discharge at 0.5A so its more accurate.
I dont drink any kind of alcoholic beverages or anything like that. no drugs smoking or anything.
the closest would be a coffee. or dr pepper/root beer.
but i already had one lol
the closest would be a coffee. or dr pepper/root beer.
but i already had one lol
Hi realflow100,
What smart charger do you use? I am looking for one and would appreciate any advice.
Kevin
What smart charger do you use? I am looking for one and would appreciate any advice.
Kevin
one of these
Amazon.com: B6 80W smart battery charger lipo nimh nicd
I recommend being EXTRA careful with the gold colored ones. as they can blow up if you misuse them or use them without care. i recommend putting a 10A fuse between it and your power source if your running off a beefy power supply or battery.
the gold colored ones do have more "extra" features though.
Amazon.com: B6 80W smart battery charger lipo nimh nicd
I recommend being EXTRA careful with the gold colored ones. as they can blow up if you misuse them or use them without care. i recommend putting a 10A fuse between it and your power source if your running off a beefy power supply or battery.
the gold colored ones do have more "extra" features though.
Sulfation is never fully recoverable, lead acid batteries should be regularly charged to 100% during storage (once a month at least, whatever the datasheet says, otherwise you will forget to do it!). Basically they are a lot of faff to maintain, forget about one for 6 months and its virtually useless.
For a vehicle in regular use they are fine since they are always left at 100% charge and never neglected.
For a vehicle in regular use they are fine since they are always left at 100% charge and never neglected.
I just found another one! identical battery. 6v 5AH in slightly better condition it seems too. using the resistor and 12v source it started at around 10.5v and then quickly over 5 minutes dropped to about 7v and still dropping quickly. (measuring at the battery being charged not the 12v battery)
I used two 150ohm resistors in parallel.
It was the same kind of powerwheels pink kids car thing as before. looked like the same model but it was just thrown in a big ditch/river
i had to clean some gunk off the battery first though and just rinse it all off in the sink. seems to be taking a charge quite a bit better though. charging right up.
I got another free 6v battery! Could hook them together in series if this one turns out to be good as well. and have a 12v battery!
pretty sweet what you can find just thrown away and laying around that just needs a tune up or put to a new use!
I used two 150ohm resistors in parallel.
It was the same kind of powerwheels pink kids car thing as before. looked like the same model but it was just thrown in a big ditch/river
i had to clean some gunk off the battery first though and just rinse it all off in the sink. seems to be taking a charge quite a bit better though. charging right up.
I got another free 6v battery! Could hook them together in series if this one turns out to be good as well. and have a 12v battery!
pretty sweet what you can find just thrown away and laying around that just needs a tune up or put to a new use!
- Status
- Not open for further replies.