My third Q8 beat the second to California, the 1st is still lounging around in Sweetwater, TX. Funny, this 1st one must have an affinity for water as it first hung out in Palm Springs before taking up temporary residence in Sweetwater. Hmmmm, a dive Q8? lol
I have three pairs of scissors I use at the bench, the smallest has blades 1 3/8” long, the next 2 1/4” and the largest 3”, the two smaller ones have very sharp pointed ends. So even a small threaded hole is not a problem to debur with the finely ground steel blades of quality shear’s. I use scissors to strip wires, cut wires, clean epoxy (cured) off a toothpick so it can be used repeatedly and whatever else they seem relevant for.
I’m fully qualified for through hole soldering. My experience level with SMD is limited to building Reprap electronics using solder paste & hot plate. Then I’ve also repaired a Nikon flash by replacing a SMD diode and inductor. So you could say I’m a novice with SMD work.
I’ve got a nice Weller Digital Iron. I’ve been wanting to buy a hot air rework station, this might be just the project I needed to justify the purchase.
There will be a voltage sag effect. Oh boy, think we talked bout this wayyy back. I'm not sure if was seen as high as 3.4V, possible though. Others may know better than I, but it sounds like you have good cells there, so may be odd to occur on 4 good 30Q BT's. I don't know off hand what 3.4V represents in terms of percentage capacity, but thinking it's bout 25%. The sag would have to be in the 0.4V range to get what you are seeing, and that's a significant drop in amps draw if it dropped 3-4 times before stabilizing. Effectively it should work the same as any other LVP enabled FET based single cell, single LED light.
Is your Q8 totally stock? If the springs are bypassed, the sag would probably be worse than normal I'd think.
It’s like that isn’t it George? This has been an interesting shipping experience, all the lights I have and it’s never happened like this before. Oh, sure, I’ve had one go to Dallas, about 2 hours North of me, and then go to Florida and come back, but that was a zip code mishap. This is a whole new thing, all the hand-offs…
Yeah, using HKJ’s info as a guide, 15% capacity at 3.4V is pretty optimistic. 3.4V is anywhere between 0% and 13%, for the batteries he measured… that’s at 1A. Even less capacity at higher amps. So effectively unable to provide max power on the Q8.
1. Is this a compatible charger for these high drain 30Qs?
(I already own a Liitokala but my buddy has the Nitecore charger and needs to know if he needs a new charger for his new 30Q batteries)
2. What mm bit do I need to fit into the threaded tripod hole on the side of the Q8? And with the newer/corrected version of the Q8 will I still need to hack off part of the bit in order to make it fit into the hole?
3.4V is at about the 2.1 Ah mark, so 2.1 Ah out of 2.86 Ah capacity is about 73.4%, so 26.6% capacity remaining. This is directly off a Samsung 30Q flat top test, so not sure if this is all apples to apples, but this is how I've thought it could be calculated.