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AngryAccountant
277
Nov 9, 2018
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Do you have a form factor in mind? I'm thinking single 18650 would be good to slip into your pocket when not in use, and you can recharge them easily enough via solar, though that'll be an added expense. They're generally not super easy to find like AA's though (unless you want to get a bit destructive and pull them out of old laptop batteries and cordless powertool batteries.) Regarding run time, here's an example of the runtimes from the Zebralight SC600w Mk III Hi in my pocket based on a 3500 mAh battery:
  • High:        H1 1126 Lm (PID, approx 2.2 hr) or H2 580 Lm (PID, 2.8 hr)/312 Lm (4.3 hr)/139 Lm (12 hr)
  • Medium:  M1 61 Lm (33 hrs)   or   M2 28 Lm (73 hrs)/10 Lm (8 days)
  • Low:        L1 3.3 Lm (18 days) or L2 0.37 Lm (2.8 months)/0.05 Lm (5.1 months)/0.01 Lm (7.1 months)
Medium modes are plenty for seeing your way around places, while still being able to throw it into high mode to identify something 50+ yards away. Durability I suggest putting the entire kit in a hard case (think smaller Pelican case), especially since the flashlight will be the most durable of the flashlight, charger, solar chain. Look for something that is IP-68 rated or higher (that's going to be intrusion resistant to dust and higher pressure water). Drop/crush resistance is harder to find/quantify, and the only flashlight I know of thats overbuilt enough to survive cars running it over and being thrown 20 feet onto concrete is the $300 Prometheus Alpha (fantastic light, but probably overkill, just throw it all in a Pelican). There are some flashlights such as EagleTac's that have built in USB ports to charge them, so take a look there, you're describing a floody beam though and they're "generally" more throwy. Things that make a light more floody to look for are small reflectors, diffusers built into the glass or addon, and larger LED surface area (the actual LED size, larger = floodier). Let me know what you think from here!
Nov 9, 2018
Kevin
5434
Outreach
Nov 9, 2018
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AngryAccountantThis is a great suggestion. I've looked at it and looks like a pretty solid option. Couple questions if you don't mind: How "Stable" are the rechargeable batteries? If I fully charge it and then leave it in the kit for a year or two, is it going to still work well? My "reliable" thought/plan was having something that was AA battery operated and have a brand new package of like 16 Energizer lithiums next to it. Another thought is the form factor, given the situation, is an EDC flashlight the optimal size? Maybe the answer is two, one EDC one, and one "beefier" one? Yeah, I plan to buy a large pelican case or something to put everything in. In terms of flashlight durability, just wanted to make it clear I don't want something made of plastic that will break the first time I drop it (which invariably will happen). Then again, I don't think anyone in this forum is ever going to suggest something like that, regardless of the usage case! no pun intended
Nov 9, 2018
AngryAccountant
277
Nov 9, 2018
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KevinSo if you're looking for long term standby, you're never going to beat CR123's (10 years is reasonable) or modern rechargeables such as Eneloops (i'm not certain offhand), which are extremely low self discharging, and you actually don't want to store 18650s at full capacity very long as it degrades them. Temperature matters a lot too, discharge rates at room temp are way lower than if it's at 110 degrees up in an attic or something, there's a reason a lot of people keep their batteries in the fridge (don't put them in the freezer though). You're not going to lack power using an EDC size flashlight with anything bigger than AA size, which another option is a flashlight that can use everything, for instance AA eneloops, AA alkaline and 14500 Li-Ion are all the same size, and if the flashlight can handle the voltage, you can use what you've got on hand. Primary batteries (non-rechargeable) are great for long standby, and once an emergency does happen, you could run on them until you have time to get rechargeables into play. With a slightly larger than AA size, 2 CR123s is very close in size to 1 18650, and there are many flashlights that can use both (wrap the CR123s in paper while in a 18650 sized case to prevent rattling.) Regarding mixing and matching multiple flashlights, two is one, and one is none. So yeah, I suggest having multiple, BUT I also suggest having them share batteries, it means more budget can go into having batteries. Make sure you put dates on the batteries too for inventory management purposes. Most EDC flashlights are beefy enough to survive a drop or two as well, so as long as there's no deliberate smashing, it should be fine.
Nov 9, 2018
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