Electrical question

[idanha rambler]

Hello everyone. So the kids and me go for long drives in the mountains and often run out of power in the batteries. I was wondering if I could charge the 7.4volt lipos with a 20volt or 18 volt battery if I used a buck boost to down the power to the 5volts that is needed for the charger. Can anyone help with this question?

 

[WickedFog]

What charger are you running that takes 5v? USB ones?

 

[idanha rambler]

What charger are you running that takes 5v? USB ones?

Yes. Why is that bad?

 

[WickedFog]

Yes. Why is that bad?

They aren't the best. If you buy a regular LiPo charger, like the Hota D6 Pro, you could hook that directly to your car battery with some alligator clips soldered to an XT60 cable

 

[WickedFog]

But to snswer your question, yeah, you can use a regular USB adapter in your car. It might take awhile.

 

[idanha rambler]

But to snswer your question, yeah, you can use a regular USB adapter in your car. It might take awhile.

I wasent connecting to my car I was connecting to a DeWalt 20volt battery. I don't know if it would be to many amps. I would be using a buck boost to regulate the power to 5volts. I planning to buy a balance charger but haven't got there yet so I'm just running a USB charger for my 5200mah and 6400 mAh batteries.

 

[WickedFog]

I wasent connecting to my car I was connecting to a DeWalt 20volt battery. I don't know if it would be to many amps. I would be using a buck boost to regulate the power to 5volts. I planning to buy a balance charger but haven't got there yet so I'm just running a USB charger for my 5200mah and 6400 mAh batteries.

That should be just fine. Your battery charger isn't going to draw any more than a few amps. Far less rlthan whatever tool that battery was designed to be connected to.

But those USB chargers aren't that good, and some have even been known to burn up. I'd recommend you grab the Hota D6 Pro when ya can. It's worth every penny. Then you can connect it to about any DC power source up to 30v, like your vehicle battery.

 

[idanha rambler]

That should be just fine. Your battery charger isn't going to draw any more than a few amps. Far less rlthan whatever tool that battery was designed to be connected to.

But those USB chargers aren't that good, and some have even been known to burn up. I'd recommend you grab the Hota D6 Pro when ya can. It's worth every penny. Then you can connect it to about any DC power source up to 30v, like your vehicle battery.

Ok thanks for the advice. Like always I value your opinions.

 

[Mrgoodwrench35]

I just wanted to stress what WickedFog said about the USB chargers. I've seen several that are usually supplied with RTR's that don't balance the lipo's at all. I saw one charge one cell to full and the other was at 3.5v. Seems like a fire waiting to happen.

 

[WickedFog]

I just wanted to stress what WickedFog said about the USB chargers. I've seen several that are usually supplied with RTR's that don't balance the lipo's at all. I saw one charge one cell to full and the other was at 3.5v. Seems like a fire waiting to happen.

Yeah, that's what happens with them. There was a guy on here that happened to if I remember correctly. They are meant to be a temporary solution. I have thrown more of those in the garbage still in the bag than I can count.