Restore deep cycle lead acid battery. Revive dead sulphated RV car marine batteries

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I'm gonna do a set of three videos that

explain how to take care of this battery

it's got three partially dead cells and

three good ones so I'm gonna show you

what to do to bring this back to life

I'll do two more videos after this one

that will explain more and you'll see

that it is possible to bring these

batteries back to life so you can bring

them back so that they're usable again

for a good number of years it's much

cheaper than buying a new battery the

first thing that you need to do is to

clean off all of the top the dirt it's

on top just make sure that you haven't

got anything between the terminals it's

going to be causing the power to leak

across them

so that's pretty good so I've loosen

these caps off we can take a look inside

and I think you can see that there is

water all of the cells have water

because I've added water to three of the

cells these three cells here the plates

were showing I didn't notice it last

summer and I kind of killed my battery

so we'll take a look at the testing to

see what we need to do to get this going

so the first thing I'm going to do is

I'm going to check each one of these

cells to see what the voltage is okay

cell number one is 2.1 2.1 2.1 that's

cell number three

cell number four two point one number


to point one you can see that they're

actually dropping a little bit and then

the final cell test to the post one

point seven so the worst cell is the

last one we're gonna make these three

come back up to meant to equal this one

and here we are across the whole battery

twelve point nine eight so it's not

terrible but I do have that bad cell and

these two weak cells that will be

causing the battery to drain faster and

when I'm camping I want to make sure

that I get all the energy I can at night

another thing we'll do is we'll use the

load tester and see what kind of shape

the batteries ran according to it

so we're right here at 12 13 volts just

about that's what we measured and we'll

pull this switch for a count of 10

that's what the instructions tell us and

we'll see where it comes back to and

where it's sitting so here we go for 10

seconds 4 5 6 7 so let's come back to

about twelve point three volts and if we

do it a second time 5 6 7 9 10

you saw that it got down into the yellow

week so it's it's got some juice but not

enough the next thing we need to do is

check each cell with the hydrometer and

see what kind of reading we get it

should be in the middle of the green a

good reading is midway in the green

section which is about twelve hundred

and eighty-five

this one's just holding on to the green

again and this one's about the same it's

actually sitting in the white just a bit

we put the covers back on and it's

putting them on loose now I'm going to

charge the battery fully on a normal

charge and I'm gonna use my charger

it's a 26 amp charger and it has the

diesel fading option on it but right now

I'm just going to charge it up to 100%

then I'll desulfation so that'll start

up automatically

and I'm just gonna let it charge and

I'll come back as soon as this charges

up it's done charging now and you can

see it's come up to thirteen point one

thirteen point one three and remove the

charger we're gonna run a 52 watt light

bulb which is the old energy savers in

Canada through this inverter Twitter

watts and there's the light bulb 52

watts so we'll begin our test I've had a

little bit of drainage on it on the top

off of the battery so we're looking at a

battery that's above a hundred percent

right now and we'll start our charge

we've got the clock at 12 just to see

how long it takes for this light bulb to

drain the battery down to 60%

so we've got our amps here our voltage

here and we'll just let it go and I'll

come back later and you'll see what the

clock shows what the voltage is and

continue from there as a point of

interest you'll notice that it's gone to

twelve point four two volts and it's

been about seven minutes so the battery

has immediately dropped and lost about

20 percent of his charge in seven

minutes we'll continue the test

so we're just an hour and 45 minutes

hours and 46 minutes into the test and

it's getting pretty late I'm gonna let

it go all night I'm expecting it to go

down to probably eleven point nine volts

by the morning probably another seven

hours away six hours away so we're still

drawing almost five amps 12.30 1 volts

so 12.30 1 volts is just about 70% full

so we're doing we're doing pretty good

with it except for the first 20% and

that's what we have to correct so we'll

see you in the morning

in five and a half hours now with this

light burning at four point eight five

amps started it out of about five answer

so it's it's slowly drawing lessons

because the battery has less power and

it's at twelve point O seven volts which

is fifty percent so don't want to take

it down too much I don't want to take it

down lower than that let's turn off the

test now and put it on charge so that it

comes back all the way up to the top

fully recharged and also what once it's

done that we'll be able to put it on D

sulphate for about a day and let that do

its under this thing and we'll do this

test all over again and we'll check it

to see what kind of difference we have

we'll take all this off and put it on

charge so it's connected now

and beginning his charging phase and

we'll come back in a number of hours

when it's charged back up again the

battery has been charging now for about

fourteen hours and it's gone into just

about its float mode so I'm going to

change this the setting on the charger

into the recovery mode which will pulse

a higher voltage up in the fifteen volt

range and I'll let that go until it

finishes a cycle and you'll see the

voltage change as it kicks on

so now it's in the recovery mode and

it's going to start to D sulfate the

plates inside the battery so come and

check on it

a little bit later this will take about

half a day so 12 hours and I'll come

back again