jon_slider
Flashlight Enthusiast
- Joined
- Mar 31, 2015
- Messages
- 5,140
The light: HDS 200 lumen Rotary w XP-G Cool White from 2011, using firmware 2.0,
The battery: Protected 16340 Lumintop USB rechargeable battery, that was previously discharged to 3.56v
Tools used. Multimeter to check battery voltage, Light meter (calibrated to the HDS 200) to measure lumen changes, iPhone stopwatch. Times are approximate (I use ~ to mean "about"). Lumens are approximate.
starting lumens: 202 on my meter (spec for the light is 200 max)
8 minutes later the Rotary stepped down for the first time to 130 lumens.
When the HDS first started stepping down, the battery tested at 3.39v (it rebounded to 3.42v within ~10 seconds).
Reinserted battery into HDS Rotary and left the light running until it turned itself off ~52 minutes later, per the following log:
turned HDS on maximum, light started at ~194 lumens
~ 2 minutes later it stepped down to ~130
~ 2 minutes later it gave a double blink, still at ~130 lumens
~ 1.5 minutes later it stepped down to ~91 lumens
~ 1.5 minutes later it stepped down to ~64 lumens
~ 1.5 minutes later it stepped down to ~45 lumens
~ 1.5 minutes later it stepped down to ~29 lumens
~ 1.5 minutes later it stepped down to ~20 lumens
~ 1.5 minutes later it stepped down to ~14 lumens
~ 1.5 minutes later it stepped down to ~10 lumens
~ 1.5 minutes later it stepped down to ~7 lumens
~ 1.5 minutes later it stepped down to ~5 lumens
less than 1.5 minutes later it stepped down to ~3.5 lumens
~ 1 min later double blink
~ 10 seconds later it stepped down to ~2.3 lumens
~ 30 seconds later double blink, still at ~2.3 lumens
~ 1 min later step down to ~1.6 lumens
~ 1 min later double blink, still at ~1.6 lumens
~ 1 min later steps down to ~1.1 lumens
~ 1 min later double blink, still at ~1.1 lumens
~ 45 seconds later steps down to ~0.8 lumens
~ 1.5 min later double blink, still at ~0.8 lumens
~ 1 min 45 seconds later, steps down to ~0.5 lumens
~ 3.5 min later, steps down to ~0.4 lumens
~ 2 min later double blink, still at ~0.4 lumens
~ 1.5 min later, steps down to ~0.3 lumens
~ 2 min later, double blink, still at ~0.3 lumens
~ 1.5 min later, steps down to ~0.2 lumens
~ 1.75 min later, double blink, still at ~0.2 lumens
~ 1 min later stop down to ~ 0.1 lumens
~ 7 min later step down to ~ 0.08 lumens
~ 1.5 min later, double blink, still at ~0.08 lumens (matches spec for this firmware, minimum 0.08 lumen)
about 30 seconds later the light turned off completely.. end of test
Battery voltage when the HDS Rotary turned itself off at end of test: 2.98v
My HDS did not blink once per second on lowest mode. I think it would like to visit Papa Henry for a tuneup.
The manual says:
Your flashlight will slowly blink once a second on the lowest brightness level when the battery is no longer capable of powering any of the steady brightness levels.
Caution:
continued use of a rechargeable battery after your flashlight begins blinking once a second on the lowest brightness level can result in sudden darkness because your flashlight will eventually turn itself off to protect the rechargeable battery.
The battery: Protected 16340 Lumintop USB rechargeable battery, that was previously discharged to 3.56v
Tools used. Multimeter to check battery voltage, Light meter (calibrated to the HDS 200) to measure lumen changes, iPhone stopwatch. Times are approximate (I use ~ to mean "about"). Lumens are approximate.
starting lumens: 202 on my meter (spec for the light is 200 max)
8 minutes later the Rotary stepped down for the first time to 130 lumens.
When the HDS first started stepping down, the battery tested at 3.39v (it rebounded to 3.42v within ~10 seconds).
Reinserted battery into HDS Rotary and left the light running until it turned itself off ~52 minutes later, per the following log:
turned HDS on maximum, light started at ~194 lumens
~ 2 minutes later it stepped down to ~130
~ 2 minutes later it gave a double blink, still at ~130 lumens
~ 1.5 minutes later it stepped down to ~91 lumens
~ 1.5 minutes later it stepped down to ~64 lumens
~ 1.5 minutes later it stepped down to ~45 lumens
~ 1.5 minutes later it stepped down to ~29 lumens
~ 1.5 minutes later it stepped down to ~20 lumens
~ 1.5 minutes later it stepped down to ~14 lumens
~ 1.5 minutes later it stepped down to ~10 lumens
~ 1.5 minutes later it stepped down to ~7 lumens
~ 1.5 minutes later it stepped down to ~5 lumens
less than 1.5 minutes later it stepped down to ~3.5 lumens
~ 1 min later double blink
~ 10 seconds later it stepped down to ~2.3 lumens
~ 30 seconds later double blink, still at ~2.3 lumens
~ 1 min later step down to ~1.6 lumens
~ 1 min later double blink, still at ~1.6 lumens
~ 1 min later steps down to ~1.1 lumens
~ 1 min later double blink, still at ~1.1 lumens
~ 45 seconds later steps down to ~0.8 lumens
~ 1.5 min later double blink, still at ~0.8 lumens
~ 1 min 45 seconds later, steps down to ~0.5 lumens
~ 3.5 min later, steps down to ~0.4 lumens
~ 2 min later double blink, still at ~0.4 lumens
~ 1.5 min later, steps down to ~0.3 lumens
~ 2 min later, double blink, still at ~0.3 lumens
~ 1.5 min later, steps down to ~0.2 lumens
~ 1.75 min later, double blink, still at ~0.2 lumens
~ 1 min later stop down to ~ 0.1 lumens
~ 7 min later step down to ~ 0.08 lumens
~ 1.5 min later, double blink, still at ~0.08 lumens (matches spec for this firmware, minimum 0.08 lumen)
about 30 seconds later the light turned off completely.. end of test
Battery voltage when the HDS Rotary turned itself off at end of test: 2.98v
My HDS did not blink once per second on lowest mode. I think it would like to visit Papa Henry for a tuneup.
The manual says:
Your flashlight will slowly blink once a second on the lowest brightness level when the battery is no longer capable of powering any of the steady brightness levels.
Caution:
continued use of a rechargeable battery after your flashlight begins blinking once a second on the lowest brightness level can result in sudden darkness because your flashlight will eventually turn itself off to protect the rechargeable battery.
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