Xiaomi Nextool XHP50.2 short review

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WestBam
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Xiaomi Nextool XHP50.2 short review

Dear All,

You can find a full, more detailed review on my flashlight blog. Use google translate. Original language: Hungarian.
In this short article I will show you the Xiaomi Nextool XHP50.2 flashlight.

Brand: Nextool (Xiaomi Youpin)
Model: XHP50.2
Emitter: Cree XHP50.2
Luminous Flux: 2000 LM
Max Beam Intensity: 40600 cd (my measurement)
Switch: electronic
Battery: 26650 (included)
Modes: 5 (turbo, high, medium, low, SOS)
Lens: Plastic
Waterproof: IPX7

The box is made of good quality, thick cardboard with Chinese writing. It already has a cheaper plastic profile that holds the flashlight and its accessories. A 26650 battery, wrist strap and a short charging cable are in the box. The operating instructions are in Chinese.

The manufacturer glued the lamp together, I couldn’t disassemble it. Only the tailcap can be removed.

The head and body form a unit due to gluing. The head has a large OP reflector with a Cree XHP50.2 LED at the bottom. The switch is on the head side of the body. The switch is interesting because it’s like a forward clicky switch, but it certainly isn’t. I think it’s electronically controlled. The head can be unscrewed slightly, here is the USB type C charging connector. The body has a tiny square texture, good grip.

Taicap has only a conductive role, a simple structure. Nextool XHP50.2 can be safely mounted on it as a candle.

A flashlight of quite a large size, compared to a couple of my other flashlights, is shown below. First in line is the 26650 battery, followed by the Astrolux S1 flashlight, Convoy C8 + flashlight, Olight Warrior X flashlight, and the Nextool XHP50-2 flashlight at the end of the line.

Easy to use. Pressing the button halfway turns on the lamp light in turbo mode. Unfortunately, the lamp always starts in turbo mode. Press the button until it clicks, the Nextool flashliht is on. After switching on, press the button halfway and then release it to switch to high, medium and low modes. To activate the SOS morse flash, press the button halfway for 3 seconds and then release it.

I also tried the built-in charging. Unfortunately, the charging current was only 1.2A, the Nextool XHP50.2 flashlight did not draw more current. The 4 LEDs next to the switch indicate the charge level. When charging is complete, all 4 blue LEDs are lit. At the end of the charge I measured 4.29V in the battery, which is a very high value, it overcharges the battery !!!

The battery 26650 is manufactured by Dalian CBAK Power Battery Co., Ltd. I measured 5463 mAh capacity, the internal resistance of the battery is 12 mΩ. It looks like a very good quality product!

Measurement started in turbo mode goes on at a fairly low luminous flux after stepping down. Because of this, it does not have significant warming. The horizontal axis indicates time, the vertical axis the temperature in ° C. Convert to Fahrenheit formula is: ° F = ° C · 1.8 + 32.

The runtime graph is more interesting. I tried it first, there is no thermal protection, there is a timed step back in the program. As the battery sinks, the luminous flux of the turbo mode decreases pretty slowly. In turbo mode, it returns to 32% after 1.5 minutes, which is roughly 640 lumens. Its light is not stabilized, it fades over time. After 200 minutes, it returns to moonlight mode.

A distance of 100 meters is not a problem, it easily illuminates the target. On the right, the tree is 100 meters away.

A larger test is a distance of 200 meters. The cave is 200 meters away from the place of photography. You can see my favorite, the Olight Warrior X, which is a much brighter lamp with the same luminous flux.

Conclusion: I was basically surprised that the manufacturer did not lie, the value of the luminous flux on the box is real. Its light is specifically usable and in the right amount, even after stepping back. Unfortunately, it overcharges the battery, which is dangerous, so I do not recommend using the built-in charger.
You can buy:
Nextool XHP50.2 – GearBest
Nextool XHP50.2 – BangGood

Edited by: WestBam on 05/20/2020 - 07:30
d_t_a
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Good comprehensive review.

Some points:

1) charged voltage: I’ve also tested charging a battery inside the Nextool XHP50.2 flashlight, and noted it charged to around 4.28-4.30v, which is overcharging the battery. Hadn’t read other reports of it, but your test confirms that the overcharging likely occurs for most Nextool XHP50.2 flashlights (unless they change it, if people will report/complain more about this issue)

2) timed stepdown
I haven’t done it runtime test for this flashlight yet (I have downloaded the zak.wilson’s ceilingbounce app but don’t have a ‘lumens tube’ and can only do some not-so-controlled ceiling bounce measurement). In your runtime graph, it appears there is a timed stepdown of 7-8 minutes, which I’ve also read from another review. Do you think this is timer based and not combined with temperature sensing?

3) battery
- you mentioned it uses BAK 26650 batteries. How do you identify a BAK 26650 battery?

I’ve noted that the Nextool XHP50.2 flashlight comes with at least 2 different types of 26650 batteries:

(measurements taken with YR1030 battery resistance tester, measures AC IR)

the left side Nextool 26650 tested 13mOhms at 3.62v (from shipped)
the right side Nextool 26650 tested 17mOhms at 3.88v (from shipped)


Which one is BAK? Any idea what the other battery is?

(I notice that Sofirn’s 26650 also uses similar to these 2 types for their 26650, but Sofirn also has a 3rd type of 26650)

WestBam
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d_t_a wrote:

1) charged voltage: I’ve also tested charging a battery inside the Nextool XHP50.2 flashlight, and noted it charged to around 4.28-4.30v, which is overcharging the battery. Hadn’t read other reports of it, but your test confirms that the overcharging likely occurs for most Nextool XHP50.2 flashlights (unless they change it, if people will report/complain more about this issue)

Your measurement also confirms that the built-in charger is faulty.

d_t_a wrote:

2) timed stepdown
I haven’t done it runtime test for this flashlight yet (I have downloaded the zak.wilson’s ceilingbounce app but don’t have a ‘lumens tube’ and can only do some not-so-controlled ceiling bounce measurement). In your runtime graph, it appears there is a timed stepdown of 7-8 minutes, which I’ve also read from another review. Do you think this is timer based and not combined with temperature sensing?

There is no thermal protection in it, only the driver has a timed step down. I heated up mine (see in stress-test picture in runtime gif picture), it was hot on my hands (~60°C), but there was still no power drop.

d_t_a wrote:

3) battery
- you mentioned it uses BAK 26650 batteries. How do you identify a BAK 26650 battery?

I’ve noted that the Nextool XHP50.2 flashlight comes with at least 2 different types of 26650 batteries:

(measurements taken with YR1030 battery resistance tester, measures AC IR)

the left side Nextool 26650 tested 13mOhms at 3.62v (from shipped)
the right side Nextool 26650 tested 17mOhms at 3.88v (from shipped)


Which one is BAK? Any idea what the other battery is?


The battery on the left is the same as my battery. It didn’t read the CBAK mark directly on it, but google helped me find the battery manufacturer. Take a photo (it all round) of the other battery and upload it here. I’ll see if there is any reference to the manufacturer.
JonnyC
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Thanks for the info on this light! I bought it on a whim because it was cheap, even though the UI really sucks.

I’d really like to be able to use the built-in charger. Utilizing a spacer, would I be okay to use a 4.35v 18650 instead in order to still use the charging feature?

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Interesting idea, but I don’t know if there is a 4.35V 26650 battery on the market somewhere.

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WestBam wrote:
Interesting idea, but I don’t know if there is a 4.35V 26650 battery on the market somewhere.

Yeah, I didn’t find one. But I’m thinking of an unprotected 18650. I just have to make sure it’s short enough to fit.

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It looks pretty good…

Professional and authoritative Acebeam agent with the lowest price.

sarge12
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I have 5 of these lights, but have never actually checked the voltage after charging in the light, which I seldom do anyway. I usually use a high quality stand alone charger for all my batteries. It is good to know that it does overcharge it though. I have well over 200 flashlights in my collection, but this one is used a good bit due to it’s normal flashlight size. Not being extremely large or small, or extremely floody or throwy either. It is just an all around good light for general use. It will never be a light I show off for high lumens or extreme throw, but for just an everyday basic flashlight, I give it high marks. It was also one of the best value lights I have bought. I paid 28 bucks each for them on sale, and never regretted the purchase.

zoulas
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sarge12 wrote:
I have 5 of these lights, but have never actually checked the voltage after charging in the light, which I seldom do anyway. I usually use a high quality stand alone charger for all my batteries. It is good to know that it does overcharge it though. I have well over 200 flashlights in my collection, but this one is used a good bit due to it’s normal flashlight size. Not being extremely large or small, or extremely floody or throwy either. It is just an all around good light for general use. It will never be a light I show off for high lumens or extreme throw, but for just an everyday basic flashlight, I give it high marks. It was also one of the best value lights I have bought. I paid 28 bucks each for them on sale, and never regretted the purchase.

I was going to buy one (or two) but someone on BLF said the stepdown was so fast and so significant that it was unusable. Is this true? How fast does it step down and by how much?

zoulas
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Sorry, that was the ED20 that had the problem, the one in the review is excellent.

sarge12
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zoulas wrote:
sarge12 wrote:
I have 5 of these lights, but have never actually checked the voltage after charging in the light, which I seldom do anyway. I usually use a high quality stand alone charger for all my batteries. It is good to know that it does overcharge it though. I have well over 200 flashlights in my collection, but this one is used a good bit due to it’s normal flashlight size. Not being extremely large or small, or extremely floody or throwy either. It is just an all around good light for general use. It will never be a light I show off for high lumens or extreme throw, but for just an everyday basic flashlight, I give it high marks. It was also one of the best value lights I have bought. I paid 28 bucks each for them on sale, and never regretted the purchase.

I was going to buy one (or two) but someone on BLF said the stepdown was so fast and so significant that it was unusable. Is this true? How fast does it step down and by how much?


Never have timed it, but it has not been an issue. To be fair, my use of a flashlight is not usually for long periods of time, so someone else might be a better judge. The few occasions when I needed a bright light for extended periods, that was not the light chosen if using a flashlight. If I were not disabled and went camping, that would possibly be an issue, but my use of such a light is usually 5-10 minutes. I think even the next to lowest setting would be plenty of light for walking at night though. I just let it run for about 10 minutes, and really saw no sudden drop. It is not thermally controlled though, and was not even real warm at the head. According to his graph it cuts back to 32% after 1 and a half minutes,,,640 lumens….but if so, 640 lumens is bright enough for my purposes. Heck, when I was growing up we made do with D cell eveready flashlights. All I can really say is it is plenty bright enough for general purposes. I used to be a HVAC technician, but this would not be a light I would carry under a house for hours. It is not a light for every purpose. When needing light for extended time I usually use my Sofirn D25S headlamp to put the light where I am looking. Example of these occasions is working on my Honda Goldwing three wheeler. I have 6 of those…they are very inexpensive and reliable. The D25S is like 15 bucks with 2xSST40 led’s for a maximum 1200 lumens, but medium brightness is usually adequate. I highly recommend that headlamp for that low of a price. It, this nextool, and my lumintop AA 2.0 are my most used lights. The really high priced super high lumen or very long throw lights are more for fun.
sarge12
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zoulas wrote:
Sorry, that was the ED20 that had the problem, the one in the review is excellent.

I just checked out the review of the ED20, and it was not very complimentary. Why would they design a light that steps down that fast and will not even return to high without turning it off? That and having to go through strobe to get it back there would be a deal breaker for sure.
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sarge12 wrote:
zoulas wrote:
sarge12 wrote:
I have 5 of these lights, but have never actually checked the voltage after charging in the light, which I seldom do anyway. I usually use a high quality stand alone charger for all my batteries. It is good to know that it does overcharge it though. I have well over 200 flashlights in my collection, but this one is used a good bit due to it’s normal flashlight size. Not being extremely large or small, or extremely floody or throwy either. It is just an all around good light for general use. It will never be a light I show off for high lumens or extreme throw, but for just an everyday basic flashlight, I give it high marks. It was also one of the best value lights I have bought. I paid 28 bucks each for them on sale, and never regretted the purchase.

I was going to buy one (or two) but someone on BLF said the stepdown was so fast and so significant that it was unusable. Is this true? How fast does it step down and by how much?


Never have timed it, but it has not been an issue. To be fair, my use of a flashlight is not usually for long periods of time, so someone else might be a better judge. The few occasions when I needed a bright light for extended periods, that was not the light chosen if using a flashlight. If I were not disabled and went camping, that would possibly be an issue, but my use of such a light is usually 5-10 minutes. I think even the next to lowest setting would be plenty of light for walking at night though. I just let it run for about 10 minutes, and really saw no sudden drop. It is not thermally controlled though, and was not even real warm at the head. According to his graph it cuts back to 32% after 1 and a half minutes,,,640 lumens….but if so, 640 lumens is bright enough for my purposes. Heck, when I was growing up we made do with D cell eveready flashlights. All I can really say is it is plenty bright enough for general purposes. I used to be a HVAC technician, but this would not be a light I would carry under a house for hours. It is not a light for every purpose. When needing light for extended time I usually use my Sofirn D25S headlamp to put the light where I am looking. Example of these occasions is working on my Honda Goldwing three wheeler. I have 6 of those…they are very inexpensive and reliable. The D25S is like 15 bucks with 2xSST40 led’s for a maximum 1200 lumens, but medium brightness is usually adequate. I highly recommend that headlamp for that low of a price. It, this nextool, and my lumintop AA 2.0 are my most used lights. The really high priced super high lumen or very long throw lights are more for fun.

I agree, this light is highly utilitarian. Feels damn good in your hand as well. Well balanced , front to back.