So, i couldn't get any beam shots at the beach because of the flashlight paradox that happens at CT state parks where the sun goes down at 8:20pm, it gets DARK at 9pm, and the parks close at 8:30pm.. So these are from outside my house, distances measured with google maps. Unfortunately not a good amount of range, but WT90 looks like Daylight at 350 meters.
I remember I bought 2 Lumintop SD75 that featured inboard re-chargeability AND power bank functions, though it had a much simpler design as the carrier was the usual 3-cell carrier with the charging circuit situated at the bottom of the battery tube.
Both SD75s had horrendous parasitic drain that it ruined two sets of 18650s. Perhaps more design research is needed to mitigate this problem, at least for me.
Personally, I will have to wait for the WT90 to iron-out this parasitic problem before I dive for this light as I am really a fan for this light’s design, performance and powerbank versatility, but a phobia for lights that has parasitic drain issues.
i was saving $$ to buy the new Lumintop top SD90 like 2 weeks before TA dropped this group buy! I wished the head was larger on that light because it looks pretty awesome otherwise. While I was trying to dig for info on it because it was new, I found 5+ year old YouTube reviews of the SD75, which seemed like it's predecessor but with the xhp70.2 . I haven't seen much about the sd90 since the WT90 came out. Interesting lol (it is $40-$50 more than the WT90 with a 10mm smaller head, which I equate to less throw).
Disabling the charging on the carrier should remove all parasitic drain from the carrier leaving only yhe normal parasitic drain from the driver itself which generally takes 2 years+ to drain a set of batteries.
Sadly I do not see the charging parasitic drain being fixed while keeping the charging working. This is why I don’t care for internal charging. It can be done but takes a lot of extra work to make it work properly.
Thank you. My Google Drive links were unfortunately messed up by some update, so I had to restore some information, e.g. manuals. If you want to update the link to the manual once again, here’s the new link:
The Charge circuit IC’s are simply not designed to have the low parasitic drain that we need. They are designed for items that are used regularly or need constant monitoring.
It can be made better but takes more expensive components and R&D that most flashlight manufactures are not even aware are necessary. Parasitic drain is something that manufactures seem to completely ignore for some reason. I have a few lights that from the factory would drain the cells in a few months.
Quite surprised to see the slow sale of the WT90. The Black version hardly moves on Ali Express’s web page for days, still 51 pieces available.
I have grabbed one Silver. Will wait to get one Black if the price drops later this year.
BTW, what happens to those large and expensive flashlights (each costing over US$200) which have been left unsold over the years? Just saw on Olight’s website, soon the new X9R will be on sale for about US$500. What will happen to the older Marauder 2, which is priced over US$200?