You CAN’T argue that the user is Now dependant on them for replacement at an outrageous cost.
Money has absolutely a big part of it. Otherwise they be cheaper right?
+1,
Voltage drop as a result of electrical resistance between the battery and (spring) contact is proportional to current. Over 10 years ago when we only had less than 1000 OTF lumens from a single XM-L T6, current draw would only be about 3 amps max from a single cell if I’m not mistaken ( which is a normal load for classic green Panasonic 3400MAh 18650B cell). Suppose the total electrical resistance between the battery and contact points results in a voltage drop of 0.1V, then that would have little influence to your flashlight’s performance.
However, if you have a modern light that draws ten times as much current from a single cell, so 30A, then that exact same electrical resistance would result in a voltage drop of a whole 1V. So even a fairly full cell with 4.0V, the driver would only “get” 3.0V under max load. Which basically means that low voltage protection is about to kick in.
Clean clean clean clean the contacts constantly to avoid this problem. One solution to bypass this problem is to solder the batteries, hence resulting in a battery pack.
I wonder when we might begin to see 4680 batteries in these types of lights, so thereby eliminating the issue with multi-cell lights and the dangers of using unmatched cells, etc. Anyone have any ideas on when that will be? Have not heard much on the new cells.
+1
Totally forgot to mention this but it's probably even more important to Acebeam than safety. They don't want people buying the light and only getting 50,000 lumens because the contacts aren't good. I've heard of people gaining 10k lumens in lights just by cleaning contacts or shifting around cells. That's not to say it isn't possible to design a carrier with good enough contacts. But like you said, spot welding is just easier. And in theory if they use thicker copper strips, direct contact should be hard to beat. That doesn't in any way mean that the easiest solution is the best. I'm just disappointed that they (seemingly) used it to include the absolute bare minimum number of cells.
More cells, especially 21700 make the light a lot bigger. I guess the idea is to have a small-ish (for the output) light with crazy performance. It will thermal throttle anyways, so why have more batteries.
Why can’t you respond to that? I know why! Because it’s true and people only respond to what they want to respond to.
you did not respond to anything I wrote, you just wanted to restate what you stated before.
Acebeam does not want Joe avagere to start mixing batteries on a 700W light, period. If you can’t stomach the costs, don’t buy a 700W light.
Should or shouldn’t aside…
Is it even possible to make a user replaceable battery carrier that can pull full 40-50 amps from each of the 4 cells? And how fast will it blow up if something came into short?
Proprietary batteries take our hobby back in time. Rayovac was making flashlights in the 60s and 70s that used AA/C/D STANDARD batteries. Why on earth, 50 years later would you want to change a good design?
On the other hand, power tool makers do not dare allow users to replace their own cells. Proprietary does make sense here as tools are abused, dropped, and left in the sun.
I Did respond. Look at post number 41. My response was based on cost not your theory.
The cost of the light has nothing to do with it. It’s the cost to replace the battery pack and how we are at the manufacturer’s Mercy to do that. I thought that was clear.
By the way I have Three lights all modified. One is $600 and Two are over $400. One of which is modified Acebeam X65 MINI… no battery pack and no step down! 
Maybe someone should post a survey on battery pack or no battery pack. I would bet the overwhelming majority chooses to use their own batteries and does not want a battery pack for many reasons I mentioned.
The question remains, can 80k lumens be achieved using a battery carrier with the added resistance? You’d require some fairly beefy springs as well.
Sold a Convoy 4X18A and had a customer insert all 4pcs 18650 30Q in reverse with the button top adapter. Completely destroyed the flashlight along with the cells. He did this even with clear instructions and then lied about how it arrived in this condition. Had another customer do the same thing, at least this guy was honest. I imagine this could be quite an issue doing the same for a model that draws much more current.
As a flashlight store, I get nervous selling models to newbies where it takes more than one cell.
Misusing/abusing a product is never an adequate reason to redesign the product. You will destroy your car if you drive 100mph then throw it in reverse. Manufactures are really not obligated to design a product around foolish people.
If you literally dont know how to put batteries in a flashlight, you really should not own one.
Unfortunately, you can’t choose who you sell to or know their level of knowledge. What you must still do is provide a warranty and user error isn’t always something you can prove if they’re dishonest.
I do have a battery safety guide at least, so many people have no idea because very few stores will care to say anything or even know themselves.
I purchased your flashlight and the brightness is terrible, I’d like it replaced or money refunded. What battery are you using, send me a photo. Oh, it’s a BRC 5800mAh lol.
Absolutely, use coupon code:
ACEX75-90
“10) Color-changing silicone sleeve monitors the temperature of the flashlight and protects for anti-impact.”
I’m just wonderng what’s that and where is it. Any idea?
I’m having Jetboil outdoor cooking system and there in a cup/pot is silicone sleeve with gel that is changing color to orange when the temperature of water reaches 100 Celcius degrees. That’s what comes to my mind.
Definitely my next floodlight. Acebeam, what is the intensity of this X75? I noticed there is a difference in size when compare to the X50.
For a light this size, it seems the built-in Fandle is going to limit its usefulness. But otherwise it looks like a winner.
Yes indeed. I will really like to see if it is capable to deliver that 80 000 lumens.
Keep in mind that no one that reviews flashlights and tests lumens has a professional setup with a verifiable calibration light source. Everyone is using a maukka light for calibration and who knows if Maukka’s Chinese calibration light used to calibrate his integrating sphere was in fact accurate. It did have a cert, but any company can produce one of those. I would have had more trust if it was USA sourced.
I have emailed a lab in New Zealand to see how much it’ll cost to test one of Maukka’s lights I purchased 2 years ago
Thanks for the info.