Are the chargers that wate sells real chargers?
Who? “Wate”?
1 Like
I noticed my freshly charged pack will drop a bit of voltage overnight.
Is leaving them on a cc/cv power supply bad because it won’t let it drop that little bit of voltage and “relax”?
1 Like
Correct.
Holding a li-ion cell/pack at its charging voltage speeds up aging. The current should stop when the cell/pack is full.
If desired a charger could top off the pack again once it has dropped below a certain voltage but this isn’t great for the cell/pack either. But charging just before we ride often isn’t very convenient so a lot of people will charge after a ride, or some other time, so they can ride at a moment’s notice.
4 Likes
Ahh…LOL…brain fart. I kept thinking you were missing letters.
That web page is confusing as hell. They mention cutoff but mention trickle and float too. I have no idea what it does when charging is done.
1 Like
This is my argument for always fast charging. I never charge my board after a ride. If I know I’m going to ride that day I plug the charger in like 30 minutes or 45 minutes before since my board is usually somewhere around 50%. And by fast charging I mean charging the whole pack at 10A. In my case, 2.5A per cell 40T
This is very common with chinese suppliers and it fucking pisses me off. Idk what happened in Chinese history that led to exclusively ambiguous descriptions for products.
6 Likes
So you’re saying the 48A works but has to be modified to work? Or is it just managing the settings to make it work?
1 Like
I do the same…charge fast just before a ride and otherwise keep the pack at whatever partial charge level it was at when I finished riding the last time (unless near empty).
4 Likes
So charging slowly and then storing at full charge for a few days will age the battery faster than leaving at storage voltage and charging fast before a ride?
I know it depends, but in general xD
The NYC skeptic in me says it’s because if they mention all the terms for a charger then anyone needing a charger will buy it. We often only see the things we want to see. 
2 Likes
There is a lot of “it depends” at play here but IMO, yes. Unless crazy fast charging is being done, like 15A/cell for P42A’s.
I can’t present test data to support that decision, it’s merely my personal choice. I don’t think we’re talking a big difference here. Convenience is probably the better priority.
2 Likes
Yeah and because the Chinese government is basically a totalitarian gangster mob like entity that doesn’t hold their own company’s accountable for shit this ambiguity can cause a fire and maybe even death and nothing would happen to the supplier for incorrectly labeling the product. I fucking hate the Chinese government and their system in general.
1 Like
But pretty much everything you buy is produced by that system.
Ironic, isn’t it? 
2 Likes
You have to set the pots to the correct max voltage (CV stage) and max ampage (CC stage)
What it dose not do is terminate the charge or balance the P groups my BMS dose that
I have “modified” it by adding a voltage and ampage meter , adding a XT60 and a 13A UK plug
Yeah. I hate it. I have to work with what I have.
1 Like
I Think of it as the following to minimise
above 80% ish
Below 30% ish
Heating up
If you can minimise them you gain a large inprovment to the life
Look at I phones thay charge to 80% then top up just befor you normally disconnect them. Apply lop power mode at 20%. Thay also have a temp scencer to shot down if to hot
How fast is your fast charger? 12s 4p fast charge is 16A charge taking 70min approx I don’t know any one that has a charger to do that unless thay have a huge battery. In reality you can proberbly go higher if you already at a float charge and the heat doesn’t build up
A standard charge 12s 4p Q30 is 6A and takes 3 hours
Hard to say honestly, I’ve never seen one drop back to a low enough level and start the charge process again. Though, admittedly, I don’t know what the delta voltage is that triggers charging or not.
The weird 10s charger I mentioned that charges to 41V will indicate its finished charging, the battery will drop voltage over time, and will definitely not automatically start charging again. I’ve confirmed this by unplugging the charger and plugging it back in after 10 seconds and it starts charging again. This is what I refer to as my storage charger… Keeps it a bit under full until I want to top it back off.
Thanks for sharing your info, this is a topic I’ve been curious about and is seldom discussed.
1 Like
This is what should happen it’s the battery’s relaxing and the voltage should settle. I bet the charger would kick back in if it dropped 1/2 a volt ish.
The main way I check is thro a power meter see how many ma is flowing in the charge at the end.
I suppose a way of checking that every one could do is use the vesc telemetry if your battery holds at max voltage after charging and dose not have a volt drop then it’s not a proper charger
1 Like
After reading this thread I dont want to charge my batterys anymore…thanks fellas…
9 Likes