Review: SkyRC Battery Discharger and Analyzer - BD250

This is a quick review of the Skyrc bd250 discharger I purchased.
I was looking for a way to discharge my packs quickly before putting the battery on my charger for storage.
This little item fits the bill with up to 35A discharge on a 2 cell lipo pack.
Description from the SkyRC site:
Upgraded from BD200, BD250 is not only a powerful discharging device but also a precise measurement tool for battery capacity. It takes the guesswork out of choosing the good-performance battery for your application. BD250 offers a maximum of 250 Watts/35 Amps to discharge your battery and will test virtually any battery type or size, any chemistry cells. It's stylish but small with a high-performance cooling system and uses MOSFETS from the well-known IXYS, to make sure it can discharge at 250 watts continuously.
www.skyrc.com/...
Where I bought my skyrc discharger:
www.rcjuice.co...
R1 Batteries:
r1wurks.com/co...
Maritime RC Racing:
www.mrcr.ca

[@trevorfurlotte]

Now that I figured mine out I love it.

[@JeffinTD]

Nice video. Wish they would have used female banana sockets, as everyone has leads for their flavor of battery connector. Would also be cool if you could select cell voltage (say 3.7) and it would auto detect cell count.

[@lawton70]

Agree, with you on that one. I wish i could discharge a 1s lipo with the discharger.

[@JeffinTD]

@@lawton70 Yeah. I’ve just purchased one of these recently, though, and so far I’m quite happy with it. I have one of those 400w two bank chargers that has decent discharge ability, but the discharge feature fried on one channel. I think I’ll use this one a good bit below max rated watts.

[@RoostedFilms]

Good clear walk through. Thanks

[@lawton70]

Thanks for watching!

[@edsherrod5216]

I tried discharging a 4S pack to 15.2 v (3.8 per cell) at 16 amps. It didn't work well. When I reduced the current to 5 amps in the discharger, the discharger worked well. It wouldn't take the pack cells down to 3.8 per cell, but 3.83 is okay and that is where the discharge stopped.

[@lawton70]

Good info! The little chart in the manual says at 4s you can do a 20A discharge so there must be something up there. What i notice is at higher amps the pack will bounce bact to a higher voltage once the discharge stops. At low amps the battery does not recover as high.

[@edsherrod5216]

@@lawton70 I noticed the same thing at higher amp discharge, that is why I tried at lower amps and got a better result.

[@АльфаВатнец]

Hello my friend, tell me please in which direction upper fan is rotating CCW or CW ?

[@TheNewnan3]

Have you been using this to lower IR in lipos for stock racing? If so what discharge and charge rate do you use? I keep reading that 30 vs 40amp is not much of a difference…

[@lawton70]

It will heat a pack at 35 amps. I think 40 amps became a defacto standard because the iCharger can do a 40 amp discharge.

[@elevatedsciencesllc8089]

So the BD250 is not capable of discharging a 1s ? I need to discharge 1s...

[@lawton70]

I personally use this discharger for my 1s lipo. It will do 20A max and it is a little more confusing to use: www.ebay.com/itm/254139418323

[@elevatedsciencesllc8089]

@@lawton70 Great tip thank you, are lipo and li ion the same? Mine are li ion ...

[@lawton70]

@@elevatedsciencesllc8089 li ion are a different type of chemistry. Typically used for transmitter packs. They have a different charge voltage and cut off.

[@D70racing]

Nice, I have the same unit. Does a good job.

[@shawnhall3008]

Just got this discharge having trouble understanding some stuff. what should my settings be set at for a 2s 7.4v 5200mah 50c lipo battery for storage I would appreciate it if someone could help me? Thanks

[@lawton70]

A 5200 50c lipo battery sounds a little weak, so i would discharge yoir packs at about 10amp to start with, and to about 7.4v to about 7.2v. That would be safe for the pack. Once you see how the pack handles the discharge and gow warm the pack gets you could bump the amps to 15. That pack is about 250amp burst.

[@fabriziodaurizio1009]

It's only a discharger, it has no need to measure each individual cells. Your rc vehicle only draws (discharges) from the main leads, (imagine trying to draw 35amps from those tiny leads) hence that's all the discharger needs to do. Ballance chargers needs to monitor each cell.

[@joevasquez1776]

Your cooling fins are fatter than the one I just got today. Just a mention

[@lawton70]

Maybe they are changing the design over time.