keme543 wrote:
小弟對手電筒情有獨鍾...(恕刪)
zebralight sc600 mkII x2
閣下覺得如何呢？
armytek predator x 2
也不錯,防水也沒問題！
以上各1也是不錯！
1近,1遠！！！
BT20續行率悲劇了
he power button is also an indicator of the battery capacity.
100% - 50% - Solid Green.
50% -20% - Solid Red.
Less than 20% blinks red.
I love this feature also. I always wanted to include this in my light build, but I’m just to lazy!
Light modes and run time are as follows:
Low – 100 lumens, 21 hrs run time.
Mid – 300 Lumens, 6.5hrs run time.
High – 450 lumens, 4hr run time.
Turbo – 750 lumens, 2hr run time.
Flash – 300 lumens, 21+hrs run time.
Now I did have an issue with run times. I ran a test for “Turbo Mode” to see if the 2hr run time was accurate and ran the test in front of a fan on mid setting. Batteries were fresh out of the charger. Both had a voltage of 4.1v according to my multimeter.
Place both in the holder and took voltage reading again.
No load – 8.0v
Low – 7.9v
Mid – 7.8v
High – 7.5v
Turbo – 7.1v
Now to my surprise, after about 2-3mins the battery indicator went red on the power button.
WTF?
I let the test continue and after about 40mins the light automatically switches from Turbo to High mode. I would manually switch it back to Turbo but after about 5mins would switch back to High.
At about the 1hr and 15min mark, the light drop to Mid. At about the 1hr and 35min mark drop to Low. At this point the power indicator was a solid red.
I can manually switch to Turbo mode but the light would automatically cycle it down to low mode. At the two hour mark the light was at “Low mode” with a solid red indicator.
I stop the test at this point. Re-did the test with a new set of fresh batteries and got the same results as above.
I don’t know why this has happened, was it the light or my batteries? I have about eight blue TrustFire 18650 from DX.
I know they’re not the best, but I haven’t had any issue using them on my light builds. So what gives? I’ve sent an email to Bob at Fenix regarding this issue and waiting to hear back from them.
Or maybe they’ll come on hear with an answer. Stay tune for an update. This is a major concern for me and anyone looking into buying this product. My option is…four 18650s is better than two.
Would it cost any more to make a holder for four 18650s as batteries are not included with this set?
Another concern is that Fenix has reversed the power plugs. The male end of the plug is now on the battery and the female part is on the light.
Not sure if this was indented to deter using existing battery packs that you may have. Or how safe it is to have the male metal plug on the battery end? Will having this on the battery make it easier for them to short out?
Also it would be nice to know what the max input voltage is. Maybe Fenix should include this in their manual under “Safety Tips” just in case anyone is trying to use a DIY battery pack. So that they don’t short out the light.
forums.mtbr.com/lights-night-riding/user-review-fenix-bt20-822522.html
