5.0 out of 5 stars 200 miles and 10 recharges later. Wow!

2026-03-03    -Michael Ash

I have been successfully using this clever device to overcome a design flaw on my 72V Dual battery Ebike which was a toggle switch to go between batteries.This device has increased the overall performance of my ebike by leaps and bounds:1) Riding 10 miles each way to work 1 battery in keep it on going back because serious uphill I had to conserve and use 2nd battery at 15 mile into 20 mile trip. Now I can maintain 40-45mph the entire trip staying with traffic2) Safe and no more blown switches. This device measures the capacity of each battery and uses the battery with more until the voltages are equal then uses them both together giving you a continuous voltage out of your batteries and allowing you to use them more optimally draining them less and using less continuous amps from each cell set

5.0 out of 5 stars Works great for Dual Battery setups

2026-03-05    -DREi22

I’m using this on my 72v Toursor X14 electric scooter. Works well balancing a 72v 40AH and 72v 20AH batteries with no issues. My long range rides went from 30 miles to 52 miles and my top speed from 50mph to 55mph on flat roads carrying my 240lb frame. I also have noticed that voltage lag while still present has a much shorter recovery period even after switching to Turbo Mode with dual wheels running at high speeds.As you can view in the image the external battery is encased in the black aluminum box on the front of my scooter. Great product so far with great performance and it was very easy to install.Note: If your electric vehicle has regenerative braking DO NOT use this device as it will cause heavy voltage spikes and possibly start a battery fire.

5.0 out of 5 stars Works great for Dual Battery setups

2026-02-02    -DREi22

I’m using this on my 72v Toursor X14 electric scooter. Works well balancing a 72v 40AH and 72v 20AH batteries with no issues. My long range rides went from 30 miles to 52 miles and my top speed from 50mph to 55mph on flat roads carrying my 240lb frame. I also have noticed that voltage lag while still present has a much shorter recovery period even after switching to Turbo Mode with dual wheels running at high speeds.As you can view in the image the external battery is encased in the black aluminum box on the front of my scooter. Great product so far with great performance and it was very easy to install.Note: If your electric vehicle has regenerative braking DO NOT use this device as it will cause heavy voltage spikes and possibly start a battery fire.

5.0 out of 5 stars 200 miles and 10 recharges later. Wow!

2026-01-14    -Michael Ash

I have been successfully using this clever device to overcome a design flaw on my 72V Dual battery Ebike which was a toggle switch to go between batteries.This device has increased the overall performance of my ebike by leaps and bounds:1) Riding 10 miles each way to work 1 battery in keep it on going back because serious uphill I had to conserve and use 2nd battery at 15 mile into 20 mile trip. Now I can maintain 40-45mph the entire trip staying with traffic2) Safe and no more blown switches. This device measures the capacity of each battery and uses the battery with more until the voltages are equal then uses them both together giving you a continuous voltage out of your batteries and allowing you to use them more optimally draining them less and using less continuous amps from each cell set