UV-18 Battery Upgrade?

[divebutt]

Hey all,

I have an older UV-18 and am looking to upgrade batteries. Currently using the older sealed style that are end-of-life. Looking at going to lithium.

I'll preface the following by saying this is primarily used up in Canada, so not putting 10 hours on it every weekend.

Seeing some well-priced options, for example: https://www.aliexpress.us/item/3256...d=2025041407340311332916142669080004134215_10

Anyone have any thoughts/experience?

Thanks!

 

[happy-diver]

I bought all the components for this from AliExpress

Thread 'Cheap and Easy UV18 Lithium Conversion with some important UV18/26 information'

Mar 26, 2019

Alright, couple of important notes because Rodney's website is wrong, as is the Tahoe data.
The below data is taken from the technical specifications from the battery manufacturer. The burn time assumptions are based on ~500w consumption from the motor which is taken from the Tahoe benchmark.
If we assume the 45 minute on high runtime is correct, the EP16 batteries that were originally installed and recommended only have a capacity of 12.5ah, or 144wh/cell for a total pack capacity of 288wh with a discharge to 9v/cell or 18v for the pack which is where the Venom is set for voltage...

• tbone1004
• Replies: 16
• Forum: Diver Propulsion Vehicles (DPV)

 

[fullytek]

Subsea offers a 30amp hr conversion.
It comes with a venom controller, stainless steel ballist kit and 2 lipo 30 ah batterys.

The cool thig about this is when the batteries reach end of life you can buy new off the shelf batterys for around 200 each

 

[tbone1004]

Glad to see the current mfg is offering one with the weight kits. It's the same thing we were posted about in the thread that was linked but should take some of the hassle out of rebalancing them. All of the UV's are a little wonky since the tolerances weren't that tight so you may have to add or subtract a few ounces of lead to get them to trim, but that at least gives you peace of mind it's from the mfg.

 

[fullytek]

Glad to see the current mfg is offering one with the weight kits. It's the same thing we were posted about in the thread that was linked but should take some of the hassle out of rebalancing them. All of the UV's are a little wonky since the tolerances weren't that tight so you may have to add or subtract a few ounces of lead to get them to trim, but that at least gives you peace of mind it's from the mfg.

Thank you and yes the meterials and tolerances on the nearly 20 yesr run thay the uv scooters had alot of variations.

The stainless weight kit gets you in the ball park but a few oz of stick on wheel weights may be nessasary to tune to your personal preference