Hello, This is the lead time. 12 volt a 100 amp hours lithium ion phosphate Leisure battery. So this serves as a replacement for most Uh 12 volt lead acid Leisure batteries with the Proviso that you don't use this for starting engines. it's not designed to provide that much current.

However, from the manual, you can see that the maximum continuous charge and discharge current is 100 amps and in fact, you can discharge it at up to 280 amps for 5 seconds. So let's get straight on with charging this battery. I'm just going to remove these protective covers and I'll get the supplied bolts and bolt covers. Here they are.

They're M8 bolts with integral washers and you get a couple of plastic covers for protection. So let's start fitting these bolts to the battery now. I Don't have a purpose designed lithium-ion phosphate battery charger, so I'm actually going to use this lead acid battery charger. It's a Milenko 10 By optimate, You do have to be cognizant of the fact that this will charge at a constant current, then a constant voltage, but then continue to charge with a float charge.

Now, there's a section in the manual that explains the difference between charging lithium-ion phosphate, which is actually simpler. It's constant current and then constant voltage. Lead acid battery chargers tend to do constant current, constant voltage, and then some sort of continuous maintenance charge or float charge or trickle charge you could call it. the battery charger does appear to be charging.

the charge light is on. You can see here that this thing says it does various steps batteries save if it's at a low voltage, then charge, then test, then maintain. Essentially the same as this graph. Let's check if it's charging I'll just zero out the ammeter and we'll check the current.

And yes, that's charging at 3.6 amps. Now these batteries are supplied about 40 charged. That means there's six D amp hours to go. So 3.6 amps that's going to take quite a while.

The only issue with using a lead acid battery charger on this battery is that after the battery is completely fully charged, the charger will continue to push current into this battery and it will eventually go over voltage and the BMS will cut off the charge circuitry. And so for that reason, I'm going to keep an eye on the voltage of this battery using my multimeter. I've added a solar panel to the mix because well, because it's sunny, just another current source to help push the battery voltage up. the battery is up to 14.2 volts.

So I'll keep going and see at what voltage the battery switches off its charge mosfets. The manual says charge to between 14.2 and 14.6 volts. we're at 14.3 so it's doing well. It also says that the over voltage disconnect will be 15 volts.

the sun's come back out. The lead acid battery charger is now thinking oh, I need to do some sort of Maintenance stuff. So it stopped charging. But that's fine because the solar panel.

Ah, and there it Is it was about 14.4 something volts. Just a bit about the size and weight of this battery. It's 13 inches wide and 6.77 front to back and it's 8.43 inches tall and the battery weighs 11 kilograms. I'm now set up for doing a full discharge of the lead time battery I've got my monitor battery set to 100 I've called it 120 amp hours so that we can see what, uh, a capacity there is over 100 amp hours.

Let's start the discharge by connecting bulbs I've got a few extra bulbs this time. a couple of H7s there. Okay, let's plug in the H4s and there we are. that's running and we're counting down 99 and we're down to 119 point something amp hours and counting back in a few hours.

The battery is down to just under 12 volts now. Of course, the current's fall and it was 17 amps. It's now 16.3 and we're approaching the point where the battery will drop out. The question is, will that 21.6 amp hours go below 20? Which would mean that we've got the full 100 amp hours from this battery.

Uh, these lamps have been on for many hours. It's a very warm day today. it's exceedingly hot in the shed. It's about 40 degrees.

The amp hours remaining has dipped under 20. So that means we've got the full 100 amp hours from the lead time. Uh, 100 amp hour battery and the voltage is still at 11.48 volts. So I'll come back for a final result of battery capacity.

When the lights go out, there it is I think it was about 10 point 3 or 10.4 volts and the final result is a little bit under 102 amp hours. So that's the lead time lifepo 4 12 volt, 12.8 volt 100 amp hour battery. Um, it is 100 amp hours. In fact, it's just shy of 102 amp hours.

It's very easy to charge. You can't really go wrong. Um, as long as you stay within the 100 amp charge current because the battery will simply cut off charge if one of it sells goes over voltage. Um, you can discharge up to 100 amps, 280 amps for up to five seconds.

And as lead time say on their website if you wanted lead acid with the equivalent capacity of this battery, it would be about five times the weight. links for this battery in the description below the video Cheerio.