Velleman Oscilloscope Battery Replacement.
Background
I purchased a Velleman portable pocket oscilloscope around 2010 and found it hugely useful over the years when working in confined spaces and when working on mobile projects where bench space is limited. However recently i have noticed that the battery is not holding its charge very well.
I decided to replace the battery pack as it was now over 10 years old. I was a little surprised at how difficult it was to get a 4.8V pack as the majority readily available seem to be 3.6V and intended for cordless phones.
I decided to replace the battery pack as it was now over 10 years old. I was a little surprised at how difficult it was to get a 4.8V pack as the majority readily available seem to be 3.6V and intended for cordless phones.
The first step was to remove the oscilloscope from its protective red case and remove the rear of the case.
This was fairly easy and allowed the battery pack to be removed.
I was able to order a 4.8V Ni-MH battery pack on line from a supplier i had previously used. The cost including postage and packing was less then GBP10.
In this photograph the old and new battery packs can be seen.
I did try to use standard AAA size batteries and a battery holder as a possible replacement but there was insufficient space inside the oscilloscope case.
The connector of the original battery pack was different to the type on the new one so the leads were cut and the wires were joined.
The solder joins were insulated with heat shrink tubing.
This picture shows the modified new battery pack showing the original connector spliced onto the new battery pack cables.
The battery pack was installed into the oscilloscope case and checked for the correct mounting and to ensure it did not foul on any of the oscilloscope components nor case securing points.
With the case still open the charger was attached and left to charge the batteries for a few hours to verify that the oscilloscope would work.
The re-assembled oscilloscope with the new battery pack after a few hours of charging.
After this initial test the battery was fully charged and put back into use.
The pocket oscilloscope has been of great use over the past 10 years so it was good to get it back into operation again without worrying about the shortening battery life while working on a project or problem.