What voltage should a 3s charge to?

[AG74683]

Charging a sky lipo 3s 3000mAh for the first time.

Currently charged to 12.30 volts, the charger timed out at 120 minutes. Im charging it at 1.5amps rather than the 3.0 that I think it should be able to handle. Is 3.0a right?

Anyways, I went ahead and started the charge cycle over. I figure the charger will shut off when the battery is fully charged, just wondering what voltage a fully charged battery will be at or around...

thanks!

[ol' gravy leg]

12.6

[Duuuuuuuude]

x2 on the 12.6

Occasionally mine will time out too. Just restart the charge cycle and let it go.

If the battery is worth half a chit it'll charge just a wee bit more mah's than its rated for.

Charging at or below 1c is safe for any battery.

[MR.VERTICAL]

4.15 to 4.18 if you are looking at your common sense balance pro

[AG74683]

excellent! Thanks guys!

What is the math behind this? I figure it timed out with the charge at 1.5a charge, I figure im gonna go full 3.0 on my next 3s charge.

[MR.VERTICAL]

1000=1.0
2000=2.0
3000=3.0
you get the picture i don't know the exact math

[AG74683]

Originally Posted by MR.VERTICAL

1000=1.0
2000=2.0
3000=3.0
you get the picture i don't know the exact math

Well I meant the math behind the 12.6voltage

Mine charged to right at 12.6. Guess they arent worth half a chit , but as long as they work I dont mind.

[Duuuuuuuude]

Originally Posted by AG74683

Well I meant the math behind the 12.6voltage

Mine charged to right at 12.6. Guess they arent worth half a chit , but as long as they work I dont mind.

12.6 divided by 3 cells equals 4.2v each. Therefor, a 2s battery will charge to 8.4v, and a 4s will charge to 16.8v.

I said they'd charge over their rated mah, not voltage.

[AG74683]

Originally Posted by Duuuuuuuude

12.6 divided by 3 cells equals 4.2v each. Therefor, a 2s battery will charge to 8.4v, and a 4s will charge to 16.8v.

I said they'd charge over their rated mah, not voltage.

Ah okay! I didnt check the mAh on it, I'll look at this one and see what it looks like.

These are way easier to charge than I thought, from all the hype I figured id be dealing with bombs.

[Duuuuuuuude]

Originally Posted by AG74683

Ah okay! I didnt check the mAh on it, I'll look at this one and see what it looks like.

These are way easier to charge than I thought, from all the hype I figured id be dealing with bombs.

They're easy really. Just don't abuse them. And don't charge them unattended...if they're going to go they're either going to go while you're using them or while you're charging them.

[AG74683]

Hm, looks like my charger only shows the charged capacity, so I don't really know what the total capacity is.

It also has an option to discharge a Lipo. Why would I ever want to do that?

[Duuuuuuuude]

Originally Posted by AG74683

Hm, looks like my charger only shows the charged capacity, so I don't really know what the total capacity is.

It also has an option to discharge a Lipo. Why would I ever want to do that?

Total capacity is what it says on the sticker on the battery. You said yours was 3000mah.

You would discharge a lipo when you aren't going to use them for a while. They'll go bad if you let them sit either fully charged or fully discharged.

[AG74683]

Originally Posted by Duuuuuuuude

Total capacity is what it says on the sticker on the battery. You said yours was 3000mah.

You would discharge a lipo when you aren't going to use them for a while. They'll go bad if you let them sit either fully charged or fully discharged.

I mean to say the charger only shows charged capacity. Meaning if I dont have the battery at 0, the capacity it shows wont ever be 3000 mAh. It just shows what went in.

The charger has a storage mode too. Would I just use that if I was storing for a while?

[Duuuuuuuude]

Originally Posted by AG74683

I mean to say the charger only shows charged capacity. Meaning if I dont have the battery at 0, the capacity it shows wont ever be 3000 mAh. It just shows what went in.

The charger has a storage mode too. Would I just use that if I was storing for a while?

A charger can't know the capacity of the battery, only what it puts in it. Once you run a lipo down to its cutoff point you will put a full charge back in it, which will be whatever the battery is rated to or greater if the battery is in good shape.

I don't have storage mode on mine so I can't answer that. If I'm not going to use a battery that is fully charged I'll toss it in a rig and bomb it around the yard for a while.

[Charlie-III]

Originally Posted by AG74683

I mean to say the charger only shows charged capacity. Meaning if I dont have the battery at 0, the capacity it shows wont ever be 3000 mAh. It just shows what went in.

You are charging at .5C (1.5A) when you could charge at 1C (3A). Thus you are timing out.
Record the mah when it times out and start the charge again, hopefully it peaks the second time. When it does add the mah from both charges and you should get a bit more than 3000mah from your pack.
Usually, when you charge ANY pack at 1C it takes about an hour to fully charge from low voltage cutoff (LVC).

BTW, if you're practicing enough, your packs should never sit long enough to need a storage charge.

[ManxCrawler]

Originally Posted by AG74683

Well I meant the math behind the 12.6voltage

Mine charged to right at 12.6. Guess they arent worth half a chit , but as long as they work I dont mind.

LiPo cells peak at 4.2V per cell and discharge to around 3.3V per cell

Your 3S is 3 cells so peaks at 12.6V and flat at 9.9V