You don't need a lower rate. I can't remember who, perhaps
@Icon13, but somebody with a large amount of battery knowledge posted some info on charging cycles/lifetime/charging rate. There was a variable that was, if I remember correctly, equal or about equal to the mAh of the battery.
Wish I could remember the details but even 750a is fairly low.
Up to you, though. I have also done things that were perhaps not necessary but did so out of an abundance of caution.
Cheers
from the
Battery University:
"When the battery is first put on charge, the voltage shoots up quickly. This behavior can be compared to lifting a weight with a rubber band, causing a lag. The capacity will eventually catch up when the battery is almost fully charged (Figure 3). This charge characteristic is typical of all batteries. The higher the charge current is, the larger the rubber-band effect will be. Cold temperatures or charging a cell with high internal resistance amplifies the effect."
Remember how the GHBs have huge resistance compared to other Li-ion batteries?
It's not good for your batteries, it's not going to kill them instantly but it will degrade them at an accelerated rate.
I've included charts before, this one explains them if they somehow don't make sense.
Feel free to continue high rate charging, but don't do a disservice by recommending it blindly.
I've gone through 7 GH batteries so far and I haven't been hopping for a year yet, so battery longevity is worth something to me, and others.
I charged those 7 cells with a 1A rate for most of their very short lives. Never again
Furthermore
,
even if high rate charging is worth it for the user, to minimise charging time at the cost of product life, doing so with a charger that is not prone to overcharging is a no brainer.
That's not to say the Nitecore D4 isn't that, it's just less precise than other options, which I consider a bad thing. If you have one that works, that's great. But there have been enough cases where that's not the case to avoid the brand. It's up to the consumer at the end of the day, and that's enough info and talk on the matter
Also, on the 18650 note, even though the battery would have a larger capacity, it will still give the best hit fresh from the charger (4.20V, ~11A draw). As it depletes the current increases.
There must be a reason that most 18650 vapes can't do what the hopper does, and HL spent so much on a proprietary option.
They protoyped with 18650s so it's not like they were alien to the idea, but I imagine choosing the more expensive and risky option must have had some solid logic behind it from these engineers.