Sky Rc BD250 Battery analyser

Welcome back to Wtf Rc Cars,
Quick look at the Sky Rc Battery analyser and discharger along with the PC software.
£69.99
www.pbmracing....
Or US$115.49 www.banggood.c...

[@scottrettig5608]

you can you arrow keys first click on slider get it very close to what value you want like .01 or .03 away from what you want then use the arrow key . it take 4 presses of the arrow key to move up or down .01 so that is why you want to be within .01 to .03 from the value you want to be at.

[@WTFRCCars]

I'll have to give it a try thanks 👍

[@cevgemv]

If I had seen this video before I wouldn't have bought it for sure. It dose not put my batteries in storage mode at least I play with the current drain and cut off voltage x cell. With this video I know it is a analyzer.

[@WTFRCCars]

It is easy to find what voltage you need to set to get your lipos down to storage :) just drain them once then see what they recover too they will always perform the same so you can find the correct voltage to drain them too every time :)

[@cevgemv]

@@WTFRCCars I did it and I found the value for 2S batteries 5000 mAH but if you change the battery for another with different capacity or different cells then you have to find the new value once again because it wont be the same when changing the capacity or the cell's number. Definitely it is not the correct device to put your battery in storage voltage. Like you mentioned before it was designed for analyzing the battery. Best Regards.

[@WTFRCCars]

Yeh definitely, it's a battery analyser 1st

[@FuManchu274]

Good work, this is what I was looking for, and it answered most of my questions! I am really curious about the 6-minute data limitation. It looks like you can 'view' for more than 6 minutes but you cannot export more than 6 minutes of data, is that correct? It's a really weird limitation they built into this charger and I am trying to find out a little more info before purchasing it.

[@WTFRCCars]

I've no idea what the 6 min was about as you can see there's no limit to what you can see, it's not a charger though it's a discharger only

[@FuManchu274]

@@WTFRCCars Have you tried to export a .csv file? I think they only allow you to export 6 minutes worth of data. However, as you commented, most racers only care about the first 5 minutes...

[@nirlachman007]

Thanks for the video! What’s the recommended C rate for discharge? For charging I always use 1C (mah/1000) but for discharge?
For example, if my battery is 5000, I charge it at 5 amps max

[@WTFRCCars]

For discharge you need to remember that the higher the c rating you discharge at the more the cell will rebound to a slightly higher voltage when you stop the discharge so, if you want a storage charge at 3.8v per cell you can discharge as fast as you like to 3.8v per cell but then leave the battery for 10 min to settle and then put it on again at 3.8v per cell but at 1c rate so 5amp for a 5000mah battery :) hope that makes sense

[@nirlachman007]

@@WTFRCCars thank you! So basically I can use even 20+ amps no? Are you sure it’s safe for the battery?

[@WTFRCCars]

@nirlachman007 yeh even 30 amps is less than most RC will draw from it, just keep an eye on it just incase it's starts to get too hot the 1st time you try at such high amp :)

[@nirlachman007]

@@WTFRCCars thanks buddy!

[@WTFRCCars]

@nirlachman007 any time :)

[@user-kk2qr3dq3w]

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

[@WTFRCCars]

I know it blows the air down through the device

[@user-kk2qr3dq3w]

@@WTFRCCars Thanks

[@tchomusic]

Isn’t 3.8 the best voltage per cell to store it?

[@WTFRCCars]

Yep 3.3v is the lowest I'd drain them when running, this was a capacity test not draining to storage :)

[@tchomusic]

Ow ok, thinking about getting one. I have a spectrum s2100 charger that has discharge capacity but i believe it is way too slow.

[@WTFRCCars]

Yeh these do it much faster

[@Chris-uv8hq]

Do you prefer this one or the ISDT FD200 you did a review on also? Thanks

[@WTFRCCars]

ISDT FD200 is not one I've had in unfortunately

[@Loz348]

why did you not mention in your video that if you discharge it at 10 amps the sag in the battery causes it to stop, it dont ramp down like the isdt chargers and when it stops the voltage shoots back up so it does not discharge to storge voltage which is the whole point of the discharger

[@WTFRCCars]

That's not what this discharger is for its a battery analyser, it's designed to put the lipo under a constant load so you can see how it behaves, it's also designed to drain lipos very quickly, all batteries will recover from a high drain when it stops so if you want to use it to drain a lipo to storage then you need to drain it fast down to 3.8v then allow the battery to cool off then set it to 1amp and 3.8v again then it will be drained quickly and correctly to 3.8v hope that helps :)

[@Loz348]

@@WTFRCCars its a battery discharger its ment to bring the voltage down to the voltage you set it to not a volt above the required voltage selected

[@WTFRCCars]

That's not how they work at all if it was and you set it to fully discharged a lipo it would have to take it down to below 3v and that would damage the cells, you can't discharged at high amps and it stay they that's why if you run your RC with lvc set to 3.3v per cell it will always be above that even though the RC cuts off :)

[@Loz348]

@@WTFRCCars try an isdt at 20amps it lands smack on 3.85v per cell everytime

[@WTFRCCars]

I'm sorry you don't understand that the isdt is a discharger and it's only function is to discharge the battery, the skyrc is a discharger analyser it's main function is to connect to the pc to give you the full graph of what the battery is doing, there both capable of being used to drain a battery there not the same thing.