The cover photo shows a Voltx battery, but none of the photos in the listing show Voltx
Max 50A discharge / charge
Not sure if this is a great deal, being that it is probably made with older cells and a low-quality bms. But hey, it's cheap.
Updated for ebay plus code. Now even cheaper!
just be careful that gas you smell is flammable so make sure you don't drop a spanner between the terminal and cause a spark
just youtube it, there are lots of videos on people restoring lead acid batteries with just distilled water and DC welder
15A is not enough to de-sulfate the plates of a dead and heavily sulfated battery, it's most probably good to maintain existing batteries.
it's possible you do that maybe 50-100 times it might work, but if you have a DC welder or can borrow one, just do it the fast way.
just make sure it's a DC welder and not an AC welder… AC welder won't do anything except waste electricity.
I've always wanted a reason to buy a welder. That's mad. Thanks for explaining how it all works. Would be good to bring a battery back to life. As long as the plates are good I don't see why batteries have to be disposable. I had one fall over in the back of my car though (and leak acid over my mates jumper), only topped up with water as I wasn't confident with acid ratios/purity to try and get the balance back.
For anyone reading this, if you do decide to try it be careful. The liquid inside the battery is a strong acid (sulfuric I think) and will burn you. Eyes, hands e.c.t are a risk. That said if you're welding without eye protection you're probably already a lost cause lol.
Yeah just YouTube it and see how they do it. it seems to work and doesn't matter how long the battery sit dead for.
Yeah it's sulfuric acid. If it dries up the sulfuric acid is just super concentrated at the bottom. That's why adding distilled water just bring it back up to the correct concentration.
Alternatively I've see video of the fully washing everything out and putting new acid and distilled water in after a good clean.
Shame MEnergy comments were deleted, here is an Australian designer and retailer that is prepared to share his pearls of LiFePo4 experience with us OZB dumboes. But rules are rules.
My concern with this setup is there is no way of really what is going on with each cell voltage without breaking open the box. Hopefully there is a puny ?100mA passive balance with the BMS circuitry. B grade cells will need balancing. To allow this push the pack voltage slowly to 14.0V (3.5V per cell) and leave this float for days. Then slowly push to 14.4V and if you get there without BMS shutting down a runaway cell then the pack is probably reasonably balanced ? perhaps. Otherwise with such an inadequate balancer with B grade cells it will be a spiral to pack capacity decay. The ultimate add-on would be an active balancer/BMS ) like the JiKong B1A8S2OP 1A. Ripping out the old BMS and putting this in would set you back another $150.
they'll be some basic passive balancing when its top balanced
even my $5 cheapo 18650 BMS has it.
I looked up this one and looking at the circuit board, there are definitely resistors to do the passive balancing.
I just can't see what resistors its on there from the picture, but it'll be something pretty basic.
not so useful when you are pumping heaps of amps into it, but good if you've got a slow charger (maybe 1A) to top balance the cells.
Has anyone bought one of these batteries and set it up to use as a backup charger for USB PD devices?
For work I depend on internet and laptop. If there's a blackout, my laptop and mobile have enough charge to run for a couple of hours, but if they could draw on 1200Wh, it would be at least a couple of days before needing to recharge.
I haven't, but I have been having similar ideas.
It would be fairly easy to wire up a 'cigarette' socket and use a car charger like this I guess - https://www.ebay.com.au/itm/313561954988
That's insanely cheap. I'm honestly shocked how far USB power delivery has come over the last 10 years.
Definitely agree though, this would be the way I'd do it.
can you put 12 (or 24) of them in your car boot and charge them for free at Tesla stations?
Then drive home and run your house off them?
No.
you know tesla stations aren't free right?
It's an interesting thought. While I'm pretty sure Tesla chargers are too "smart" for this. It'd be pretty interesting to know how well it'd work for some of the generic ones.
Talking purely theoretical. You'd have to create your own BMS and charging circuitry, then you'd probably want a plug on the outside of your car. The connection to your house would be pretty interesting also, would be a mass electrical regulations and costs to deal with. But maybe you'd be able to run a few basics in your shed. I know of a place with free charging but you'd almost definitely be breaking policy parking a regular car there.
Actually some cars are able to be plugged into houses now (to feed power in) so I'm not too sure how that'd go down with the free power use. Charge up at work then use the energy at home to cook dinner lol
I've done capacity test on this battery (bought previously) and got about 106Ah. Recommended.
Hi, would this be good for a 2008 toyota land cruiser prado D4D diesel ? I have no idea about car batteries but this looks like a good deal but everyone is talking about using it in caravans and stuff so not sure.
What are you using it for? It won't start a car if that's what you're asking.
Could be good if you want a 'deep cycle' secondary battery to run a fridge or whatever.
I bought one of these a few months back to go with a single 300W solar panel on my roof. Good value and should last years.
Coming up as $320 for me. Coupon did not work
I got mine yesterday. Tested 92 amp hours at 20 amp discharge rate. It was possibly not quite fully charged.
My charger pumped in 30a when I first charged it.
Need to figure out how I'm going to discharge mine without going camping.
Tried running the dryer off an inverter. It was happy putting out 1500w, but I didn't run it for long
How did you test it?
I have a RC car charger that can discharge at 20 amps.
you'll be lucky to get a cheap AGM to pull 92 amp at 0.2C
AGM are usually rated at 0.1 or 0.05C so when you pull at higher rates, you get less capacity.
Price coming up as 500 bucks?
I don't know what the story is - but this link now goes to a different brand and capacity (Voltx 120AH), and it seems to keep changing.
The original one is now listed here for $329, but the code doesn't work - https://www.ebay.com.au/itm/124212208410
Not sure if they're doing something shady with 'discounts' or reviews. There's no way the generic 100AH one was ever $2919!
OP link now goes to 120ah item
@senorclean link goes to the original 100ah page and with the 20% its cheaper is $279.20
Item price:
AU $349.00
-AU $69.80Discount amount:
Your price:
AU $279.20
Price jacked from $319 to $549 for the 22% off promotion! Much more expensive now after the discount than normal price before!
Actually - through this listing - https://www.ebay.com.au/itm/124212208410
I'm seeing $349 - with 22% code brings it down to $272.22
Great deal. This battery can discharge at up to 60'C as well.
The 100ah VoltX that i was previously looking at doesn't support discharging above 50'C, and our car often exceeded 50'C inside the cabin when parked in summer.
The VoltX 120ah does support discharging up to 60'C tho.
![[eBay Plus] 12V 100Ah Lithium LiFePO4 Deep Cycle Battery $272.22 & Free Delivery to Most Areas @ Outbaxcamping eBay](https://files.ozbargain.com.au/n/92/723192.jpg?h=d1cb7a83)
I might give that a try, outdoors, with safety gear in case the acid splashes around while boiling.
So far I've only tried to connect it to a fully charged working battery. Drew a max current of about 15A @12.5V. Bubbled a bit, smelled awfully of H2S.
Didn't restore it though. Connected to a slow charger afterwards (3A max), the voltage dropped off again and kept dropping below 10V.