Losi now offering a Lipo option for Micro-T

ChemicalInDependency · Fri Mar 02, 2007 9:27 pm

The power drawn from the bats is a constant supply (untill it runs out). Batteries discharge at a fairly constant rate. With the 2500mah rechargeable AA's available these days thats not a bad idea. It would keep it portable (However with the hack job he did on the case i wouldnt wouldn't tote that thing around.)

Namuna · Post by **Namuna** » Fri Mar 02, 2007 9:50 pm

Well shit then, I'm orderin the Apache 2030 (does BOTH nimh and lipo) TONIGHT and I'll just pick up an 8xAA batt holder from rat shack and call it christmas!

SHAUN · Post by **SHAUN** » Fri Mar 02, 2007 10:15 pm

If your calling it Christmas order some alloy to!

ph2t · Post by **ph2t** » Sun Mar 04, 2007 4:54 am

fuck the charger, look at the bling on that micro-t

Clint · Post by **Clint** » Sun Mar 04, 2007 11:27 am

I just tried 8 fully charged energizers(2500mah) and the apache 2020.
The status light on the apache just blinks-error. The 2020 says it needs
10.5v minimum. Piggy back 2 more nimh batts for 12v and it'll easily work. Those 2 cell AA holders from rat shack will work perfectly.

that guy must be using alkalines 8x1.5=12v
nimh 8x1.2=9.6v

Checked the energizers with a multimeter 10.1v fully charged.

Murdoch · Post by **Murdoch** » Sun Mar 04, 2007 2:47 pm

180mah? that's it??

I got four Ultrafire 500mah AAA li-ions sittin right beside me. They would be the dog's nuts for the Micro-T.

Namuna · Post by **Namuna** » Sun Mar 04, 2007 5:09 pm

Murdoch wrote:180mah? that's it??

I got four Ultrafire 500mah AAA li-ions sittin right beside me. They would be the dog's nuts for the Micro-T.

Yeah, but what's the discharge rate on em? If they can't happily provide 2.1A mps (which is what the stock motor can draw up to)...Then you might have some wrinkly old dog's nuts there.

Murdoch · Post by **Murdoch** » Sun Mar 04, 2007 7:22 pm

I remember throwing them into my xmod and just hammering on the throttle. batts got warm but nothing too bad. I know they were drawing at least 1.5C from these because I did some pretty heavy duty driving (motor was absolutely cooking). So if you could do a 2s2p setup you could easily provide 2.5Ah.

Once I get my iWaver together (with a custom motor that pulls the maximum juice the xmod stock fets allow), I'll put these inside and get an idea of their runtime and discharge characteristics.

Found a thread about them here. They only tested up to 600mah on these. I believe further research is necessary.

Now, if the Micro-T can fit in AA size Li-ions, you could go with these inside.

Another option (this may require modification) is these Li-Fe-PO4 cells, which are rated at 1300mah and 10C discharge!

Clint · Post by **Clint** » Mon Mar 05, 2007 1:30 am

This works great. Props to Namuna for mentioning this in the other thread.

It's only a 1250mah, but 4 charges is plenty of runtime on a brushless micro-t. Bonus: there's no way to ruin the power source lipo as the apache will stop the charge when the input source drops below 10.5v. The apache can also charge that 3 cell kokam.

Stack the apache on the lipo and tie off the wires and it's half the size
of the losi charger.

ChemicalInDependency · Mon Mar 05, 2007 1:17 pm

Im still trying to get away from using batteries to charge batteries, but it is good to know that there are a ton of options out there.

Clint · Post by **Clint** » Mon Mar 05, 2007 9:00 pm

ChemicalInDependency wrote:Im still trying to get away from using batteries to charge batteries, but it is good to know that there are a ton of options out there.

Here's a 12v regulated power supply 4.1 amp. In a nice portable size. 25$
I'm going to grab one for general use. (it's probably a generic laptop power supply)

http://www.powerstream.com/ac-1245.htm

Code: Select all

Model Number	PST-1240 Switching Power Supply
Load Regulation	±3% over rated current: 0 - 4.1 Amps
Output Voltage 	12 VDC
Dimensions	58mm x 32 mm x 120mm (2.3 inch x 1.25 inch x 4.7)
Weight	240 grams, 8.5 oz without the AC cord

Clint · Post by **Clint** » Mon Mar 05, 2007 11:22 pm

..and a 10 cell AA 2500mah.
Two 4 cell holders and a 2 cell from radio shack. $1.75 each.
Meter shows 13.5v

I feel a bit safer carrying AA's around than carrying a 15C 1250mah lipo.

Now I need one of those project cases.

Murdoch · Post by **Murdoch** » Mon Mar 12, 2007 1:43 am

hey nice work clint.

I'm running some tests on the AAA cells I have. I'll let you guys know what I find out.