REVIEW: QR-E 250W ELECTRIC BOOSTER BICYCLE MOTOR AND B60i AND B70 BATTERY

[3dxl]

I think Blueberry posted about having opened up a Qiroll battery, you might send him a message about details if he doesn't respond to this thread. I suspect that the plastic cap may be glued onto the aluminum tube which may have to be destroyed in order to open it up. Keep us posted.
On another front I've found that my old used Pro works surprisingly well with the 24v battery from my mute model. I have several Ryobi 18v 4ah power tool batteries that I want to wire 2 in series and see how that works for the Pro.

Thanks for the info, i'll try to contact/pm Blueberry later. Btw how do you connect to alternative battery to Qiroll unit that have 3 terminal plug ends? Does Bafang/Hailong battery pack 48V works on Qiroll?

 

[EMGX]

You only have to use two (+ & -) of the three terminals when using a standard non-proprietary battery. The third terminal isn't required. I think blueberry first posted this information also. I've run my Mute version with both 48v and 36v batteries and a buck converter that can drop voltage up to 60v down to 24v. BTW I've also used a 5v buck converter so the Qiroll or other batteries can be used as a battery bank to charge devices such as phone.

 

[blueberry]

Hey! Yeah you can get the cap off the H70 without destroying it, though it’s rather tedious. I applied heat from a hair dryer and repeatedly slid a thin knife in the gap until enough of the adhesive was weakened to pull off the cap.

Obviously the battery will end up with scratches and you might want to reassemble with extra adhesive of your own at the end, but it should work. Be mindful not to short the exposed terminals and solder joints inside…

 

[blueberry]

Blueberry, if you still check in on this thread, where did you see that they (Qiroll?) say B70 batteries can be used with the Pro? I did message them and all they messaged back is the generic statement that the H70 is for the Pro and the B70 is for the Mute. I ended up buying a Pro and did try the B70 battery from my Mute just to see if it works, which it did but it was just a short test run. I'm planning on riding the Mickelson trail in South Dakota next week (weather permitting) and taking the B70 battery along as a power bank and as a standby for the Qiroll but don't want to run it on low voltage if it could overheat or otherwise damage the motor.

Either an old eBay/AliExpress listing or their website, don’t quite remember where but they definitely said it somewhere. I also tried it out and it did work… personally I wouldn’t worry about overheating with the B70, except perhaps on steep slopes where performance would already be marginal.