Aquapulse AQIB ... batteries?

[RKC]

G'day,

I have an old model Aquapulse AQIB (about 10 years old) that is giving me problems. It works OK for a short time and then is too erratic to use with any confidence. I'm fairly sure its because of the batteries. So I want to replace the batteries. Its just not worth sending the whole detector back to Aquapulse HQ in England to have the new lighter factory batteries installed, with all the time and expense that would involve.

So ... I need to replace the batteries myself. I've done extensive searches of the Internet, and this forum, for information on what batteries to use as a replacement. I could not find anything expect that other Aquapulse owners have mentioned they successfully replaced the batteries (without any details).

I don't want to use rechargeable batteries any-more as they are massively inconvenient in the field when away from any charging points. Could I just string together seven ordinary c type batteries, and connect it to the detector?

Or ... any further suggestions.

http://imagizer.imageshack.us/a/img921/1408/CaDUeD.jpg

http://imagizer.imageshack.us/a/img922/5656/AzhOc7.jpg

Regards,
Rob (RKC) New Zealand

[Geo]

You can use Six (6) ordinary C type batteries, they will give 9V but no problem because is close to 8.4V of the existing battery.
Also you can use a diode in series with ordinary batteries so to take 8.4V out...

[Skippy]

Those cells are NiCad, and are of low capacity by modern standards. Equivalent NiMH (nickel hydride) cells typically have double the capacity, 5000 mAh, hence a pack of 7 of those will last twice as long as the originals would've done. Tagged cells are easily purchased.
Example (from the U.K):
http://www.strikalite.co.uk/prodcat_...Batteries.html
If you need a backup, make up a second pack.
You would need to consider the charger, though. If you used the trickle-charger for the NiCads, it would need leaving on for double the time to fully charge a 5000 mAh pack. It would be worth investigating what quick-charging options are available.

Also, that connector looks like one commonly used in remote-control cars etc, for battery packs, look online for Tamiya connectors, see if they match.
https://en.wikipedia.org/wiki/Tamiya_connector

[kt315]

can you share hi res pics of the AP AQ with me? my email [email protected]
some one had gave me the pics low res and promised to draw schematic. i still wait but seems people do nothing
if promised.