"Check battery" safety override

[cm0002]

Hi!,

Is there a way to override the "Check battery" safety? It seems to be a bit too sensitive. My batteries are old and I do have new ones on the way, but the olds are still able to charge and discharge and are at about 4.20 fully charged.

The batts are not completely shot as if a futz with my mod for a while i can eventually get it to fire for a bit, so i just need to bypass this safety check for a few days (Serial command or whatever) until my new ones get here.

[BillW50]

What type of board does your mod use? Directions are different depending on the board.

[cm0002]

Just now, BillW50 said:

What type of board does your mod use? Directions are different depending on the board.

DNA250c

[BillW50]

Try in EScribe... Options -> User Interface -> Manufacture.

Mod -> Battery -> Cell Soft Cutoff (set to 2.50v)

Upload settings to device

[cm0002]

8 minutes ago, BillW50 said:

Try in EScribe... Options -> User Interface -> Manufacture.

Mod -> Battery -> Cell Soft Cutoff (set to 2.50v)

Upload settings to device

Thanks, but I still get the Check Battery message, I even dropped it to 2v (escribe wont let me go any lower). Although the Weak Battery message i would occasionally get on a diff old batt set seems to have disappeared lol

[BillW50]

Well 2v is probably getting dangerous. Lithiums get into trouble when their voltage is too low. I'm sure the cells will hold a 4.2v charge. But the real problem is they lost their high amperage and just can't keep up anymore.

[cm0002]

Hmm, I see, do you have any other overrides/bypasses for the amperage? I really don't mind living on the dangerous side for the weekend lol

[BillW50]

Batteries could explode. Best thing to do right now is to cut down on the wattage.

[cm0002]

5 minutes ago, BillW50 said:

Batteries could explode. Best thing to do right now is to cut down on the wattage.

Problem is, that was the first thing I did. Normally I'm at just 100W/300F (I'm in temp mode) Dropped to 60W/300 still got message even with dropping to 2v on the soft cutoff. Just now tried dropping all the way down to 1W and still got the message lol 🤣

[BillW50]

Sounds like those batteries are just toast. Nothing can be done to save them unfortunately.

[Wayneo]

There is no bypass or override. The board itself has a hard cutoff. You don't get to live on the dangerous side with their board. No other board, or batteries or mod?

[Wayneo]

2 hours ago, cm0002 said:

I even dropped it to 2v (escribe wont let me go any lower). Although the Weak Battery message i would occasionally get on a diff old batt set seems to have disappeared lol

Yup, sounds right. You're blowing right through the 'weak battery' message. IMHO you'd be better off setting your cell soft cutoff to 3.2-3.4V so you'll see that 'weak battery', and have that 2nd pair charging in the mean time.

BTW, what is each cell voltage right now?

[cm0002]

1 hour ago, Wayneo said:

There is no bypass or override. The board itself has a hard cutoff. You don't get to live on the dangerous side with their board. No other board, or batteries or mod?

I mean I could, but I don't have the time to take on a hardware hacking project for my vape lmfao. Nah, I ran a lil to long on my last 2 sets of batts. I have some 18650s that i've pulled from old laptop batts, but so far all the ones i've cycled through get the same check battery message no matter the wattage.

43 minutes ago, Wayneo said:

Yup, sounds right. You're blowing right through the 'weak battery' message. IMHO you'd be better off setting your cell soft cutoff to 3.2-3.4V so you'll see that 'weak battery', and have that 2nd pair charging in the mean time.

BTW, what is each cell voltage right now?

Thanks for the tip, I usually put one set into the charger as soon as its pulled, but maybe it could give me a lil earlier warning to swap if im about to leave somewhere lol. 1 cell is reporting 4.201 and the other 4.20 (Its been plugged into the computer for a while)

[Wayneo]

If you use escribe -> device monitor and click on cell 1, cell 2 and take a puff you'll see just how much sag there is. The board cutoff is 3.0v standing voltage (just sitting there) for each cell. That can drop below 3V during a puff down to the hard cutoff, which no one can change.

54 minutes ago, cm0002 said:

1 cell is reporting 4.201 and the other 4.20 (Its been plugged into the computer for a while)

I was hoping you did that earlier.

The less watts you use, the longer they'll last, and leave those old laptop batteries for flashlights 😂

[cm0002]

1 hour ago, Wayneo said:

If you use escribe -> device monitor and click on cell 1, cell 2 and take a puff you'll see just how much sag there is. The board cutoff is 3.0v standing voltage (just sitting there) for each cell. That can drop below 3V during a puff down to the hard cutoff, which no one can change.

I was hoping you did that earlier.

The less watts you use, the longer they'll last, and leave those old laptop batteries for flashlights 😂

Ohhh, sometimes total voltage drops to 0, sometimes cell 1, sometimes cell 2 but only one at a time is ever at 0 but all of them can be non-0. First image is each an attempt to fire, the second image is one time it actually let me fire and I captured it.

Listen, the laptop batteries are an act of desperation lmao 🤣 if I could get one set of them to just last 30 minutes I would be happy until Mon/Tues when my fresh sets come in 😂 if this thing would let me bypass the batts entirely and power off USB I would def do that too 🤣

Edited November 4, 2022 by cm0002

[dwcraig1]

As Bill said "batteries can explode" and those salvaged laptop batteries are of the chemistry that does it best. Laptop batteries are generally  4 to 5 amp continuous discharge rated. To supply 100 watts from the board cells with a rating of 15 amp minimum would be required. Personally I would use 30 amp rated cells. You are running a huge risk by over taxing them. If you want to salvage cells from something power tool batteries would be a good source, though I wouldn't recommend doing that either. 

[cm0002]

@dwcraig1

@Wayneo

@BillW50

Thanks everyone, I have discovered with some rhythmic pulsing of the fire button it seems you can glitch the hardware batt safety for a bit (or something else, maybe the chemistry finally decides to have mercy, im not digging into it any further since i have my fresh sets coming Mon lol) annoying, but workable for a weekend. Yes, I stopped using the laptop batts lol so i wont blow my house up as you were right dwcraig1, the highest amp batt from my laptop stock was maybe 10 (There goes my doomsday plan lmfao). So I tried this glitch thing with my actual mod batts and it seems to work well, I figure actual mod batts that are on life support are safer than a 10 amp laptop 18650 😂

For anybody else looking, it seems to glitch if you push fire button down for around 1-2 seconds release and immediately fire again for 1-2 seconds and then repeat until you give up or it starts firing. If you have a sharp eye you can roughly tell by how long "Firing" stays on screen before "Check Battery" is displayed if you're getting the timing right, the longer the better. This could probably be script-able and then you could get some much tighter timings down and possibly much much more reliable lol. Proceed at your own risk.

[dwcraig1]

The best work around would be to lower the wattage down and take long slow hits.