a) it charges
each 12v battery INDIVIDUALLY to properly control the battery
voltage during charge. It has 2x 12v charge outputs. Two isolated separate 12v
battery chargers in one case.
So while being a superior charger it
does require that you fit 2
Anderson Style connectors
to the individual batteries. That's pretty simple though and the other benefits
of those connectors can be huge! See link.
Why does it charge batteries individually? Not all batteries or
cells are created equal and its quite usual with a normal mobility type charger
to overcharge one battery and undercharge the other as the mobility charger sees
only the total voltage of both batteries. It charges them as a string of
batteries in line or in "series".
Your batteries will then, last longer and range may well be
improved too as both batteries are kept accurately in balance with less
"overcharge" being applied by the charger which dries out the electrolyte over
b) it charges at 10 amps.
That means you will be charging in the main "bulk" phase twice as
fast as the typical 5 amp mobility charger supplied with your scooter or
powerchair. Or in a third less time if your existing charger is a 7 amp
No more waiting for the "ready" light in a morning. And no it
absolutely does NOT harm batteries to charge them faster! If done in a properly
I charge mine with various devices at up to 100 amps
without issue. Just as your cars alternator does. I also
charge my powerchair directly from my
van. via the same
Anderson Style connectors
and I use them to power inverters to run power drills, computers etc.
c) its a switch mode 4 stage stage logic
controlled device that is
designed for either Gel batteries like the common MK ones or AGM batteries such
as Optima and Hawker Odyssey. Switchable (details later) So its both
efficient (89 percent) and kind to your batteries. And will save you money in
batteries and electricity in the long term.
d) it has no fan to keep you awake!
And is sealed, potted in resin and totally 100 percent
waterproof. And thermally stable, and shock proof too!
e) It is smaller than many old style heavy
transformer mobility chargers and around the same size
as a 5 or 7 amp switch mode "travel" charger.
Compared to a 7 amp powerchair travel charger. Its longer, slightly wider, but
not as deep. It is heavier though. Don't take it back packing.
As it arrived! It is available in either 110v or 230v versions depending where
you live. Its actually intended to supply a boats battery banks and keep them
topped up. But its perfect for a wheelchair.
Most MODERN logic controlled Powerchair Chargers are optimised for Gel
batteries. This charger has that option too. As it comes it is ready to charge
Wet Acid deep cycle batteries and good AGM batteries like the Optima and
Odyssey. But cut the yellow wire (it wont explode!) as shown below and it
is then optimised for Gel batteries. You choose! And you cant change your mind!
The Gel setting is safe for all batteries even AGM ones though. Its just less
"perfect". So if you are unsure then cut the wire and set it for Gel!
Before cutting this wire you get 14.6v
during absorption phase while charging and then after the charge light goes out
it "floats" the batteries at 13.2v indefinitely - Perfect for Quality AGM
batteries like Optima, and Odyssey that I use. (Normal mobility chargers can
also be used on these AGM batteries but they undercharge by a few percent
although that generally isn't a problem.
After cutting the wire you get 14.2v during
absorption phase, dropping to 13.7v /13.8v indefinitely. Perfect for the MK Gel
batteries and similar Gel batteries. As actually measured. That's better
and a closer match than all the mobility chargers that are supplied with the
powerchairs that I ever tested. They are mostly 14.4v peak (28.8v) and 13.8+ or
no float at all.
Front. It doesn't get simpler! One power led so you can see its plugged in. One
charge LED that shows you its charging. When charge completed it goes off. At
that point you are ready to go! Or leave it plugged in for permanent maintenance
"charge" quite safely for as long as you want be it months or years.
Bottom. This is grey resin. Its why its reliable, waterproof, heavy, thermally
stable and not repairable if it goes wrong! But they don't!
You need to fit a pair of these to your powerchair or scooter. Its pretty easy.
Search eBay for Anderson connectors 50 amp. You need 2 for the charger. 2 for
the powerchair, and some spare ones since you can now use them for powering
inverters, laptops, etc. And it doesn't matter that you use one battery since
the charger will rebalance the batteries every night. I bolt mine to
a small aluminium plate and then it just works like a single plug/socket.
Here are some more I made earlier (blue peter style!) These are for my
powerchairs. They just bolt under the seat frame on the side out of the way.
PDF Instruction &
Specs Manufacturers Specification.