Need help to charge battery. - SparkFun Electronics Forum

Need help to charge battery.#123548

By sasaji123 - Wed Mar 23, 2011 4:37 am

- Wed Mar 23, 2011 4:37 am #123548

Dooes anyone know if it would be possible to charge this battery with any of the sparkfun lithium polymer chargers?

http://cgi.ebay.com/2Ah-Battery-fit-CRE ... 588d103fb7

Re: Need help to charge battery.#123572

By PappaNiklas - Wed Mar 23, 2011 9:43 am

- Wed Mar 23, 2011 9:43 am #123572

ps
he has edited the picture and erased the mAh-text in the batery, just so you know
ds

Re: Need help to charge battery.#123599

By Chagrin - Wed Mar 23, 2011 2:26 pm

- Wed Mar 23, 2011 2:26 pm #123599

It looks like a typical 3.7V LIPO. Any of Sparkfun's 3.7V LiPo chargers would work (I think they're all 3.7V, actually).

Re: Need help to charge battery.#123638

By Sacman - Wed Mar 23, 2011 9:54 pm

- Wed Mar 23, 2011 9:54 pm #123638

If you are looking for cheap Li-Po batteries, I would suggest

http://www.allelectronics.com/make-a-st ... ERY/1.html

I have one of these and the 900mAh one they sell. However, the smaller one is only a 2 wire connector which I think means that it does not have the charge control circuitry that you find on most of them.

Wade

Re: Need help to charge battery.#123674

By sasaji123 - Thu Mar 24, 2011 9:03 am

- Thu Mar 24, 2011 9:03 am #123674

Sacman wrote:If you are looking for cheap Li-Po batteries, I would suggest

http://www.allelectronics.com/make-a-st ... ERY/1.html

I have one of these and the 900mAh one they sell. However, the smaller one is only a 2 wire connector which I think means that it does not have the charge control circuitry that you find on most of them.

Wade

Isnt that a lithium ion battery? Will the lipo chargers here charge lithium ion?

Re: Need help to charge battery.#123677

By Liencouer - Thu Mar 24, 2011 10:32 am

- Thu Mar 24, 2011 10:32 am #123677

Sacman wrote: [... ] However, the smaller one is only a 2 wire connector which I think means that it does not have the charge control circuitry that you find on most of them. [...]

The 3rd wire is usually a thermistor, as it is in the pack you linked to.

Re: Need help to charge battery.#123683

By PappaNiklas - Thu Mar 24, 2011 12:14 pm

- Thu Mar 24, 2011 12:14 pm #123683

Ive been running RC-cars for the last 15 years, and there are nothing "usual" in a threewire connector on a 1-cell-lipo
The usual is a two wire power connector and a "enough"-wire connector for chargebalancing

... I havnt ever heard of three wire connectors on a LiPo-pack so i can measure the temp of the pack ... if the pack is more than "handwarm" you are either charging or disscharging it to fast, an the chance of ballooning the pack with a following fire is immenent ...

PS
As i am Swedish, you may laugh at my spelling and grammar, but please please don’t comment it if you understand what i mean
DS

Re: Need help to charge battery.#123712

By Sacman - Thu Mar 24, 2011 7:57 pm

- Thu Mar 24, 2011 7:57 pm #123712

Some new information for me in all of this.

Can someone clarify the charger question. I was under the impression that the a Li-Ion charger and a LiPo charger are one and the same. The only concern is if you go to a completely different type of battery like a NiCAD.

Thanks,

Wade

Re: Need help to charge battery.#123737

By sasaji123 - Fri Mar 25, 2011 6:37 am

- Fri Mar 25, 2011 6:37 am #123737

I just noticed the three wires. Now would I need to buy a certain jst connector or just use the one the lipo charger comes with? Whats the best lipo charger here anyways? Thanks for the help guys.

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