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Lwlongwei DC Power Supply 30V 10A Adjustable Switching Regulated DC Bench Linear Power Supply with 4-Digits LED Power Display 5V/2A USB Output
LWlONGWEI DF Serial SWITCHING DC POWER SUPPLY
Features:
1.USB interface 5V/2A, Power display window show.
2.Single phase, single output dc power supply
3.Constant voltage and constant current operation (C.C and C.V. automatic conversion)
4.Both current and voltage can be adjusted from 0 to rated value
5.4LED digital display
6.Intelligent temperature control fan to help power supply cooling fast
7.Perfect protection,Current limit,OV,Over load,Over temperature.
Rated working conditions
Input voltage: 220V±10%@50Hz, or 110V±10%@60Hz, manual switching
Working environment: Temperature: -10 ° C ~ 40 ° C Relative humidity: <80%
Storage conditions: Temperature: -20 ° C ~ 80 ° C Relative humidity: <70%
CE
CE
CE
Test report
DAN V.
2025-08-26 12:08:54
I successfully used this power supply to revive an ebike 52V battery that I let go to low voltage during the winter months. The settings were easy to understand and the adjustments worked well.My issue, I found that the leads which came with this power supply could not be inserted/connected into the outputs, (deduct one star) fortunately I had a spare set of leads which connected easily without issue.I contacted the seller to address this issue, otherwise I find this PS a good value.Note: I did order a set of 3ft leads to make the PS more convenient to use in my workspace.Update: ALL GOOD! Seller responded to my issue promptly and reimbursed me for the new leads that I ordered!I changed my "overall rating" to 5 Stars from 4 stars for the excellent customer service.
Imack Collins
2025-08-07 16:58:48
The product is doing what is supposed to do so far and hope it does that as long as it takes. I use it to replace an expensive power supply for a pool robot, and it provides the necessary voltage and amps required by the system. On top of that I can see the amps been consumed by the robot operation which may indicate problems if it raises above normal...!
Harvey Johnson
2025-07-23 13:35:51
I thought it wasn't working, but the CC CV works a little differently than I had assumed. To test the full output, you need the right load. If set to the 30V and 10A limits, a 3 ohm high wattage resister clipped to the leads will show that the unit can put out over 200 watts. If you short the leads, you only see 8 to 9 watts because the CC kicks in.
Brian
2025-04-22 10:06:47
Smells like something is burnt inside? Hear a pop every now and then, says running full watts but no amps etc, fan turns on every little while like it’s starting to work then stops again. Unfortunately past my return window should have looked into this sooner
Terry C
2025-03-12 09:15:13
Quality looks good. Tested it for all specifications. Performed as expected. I really like the LED display. Accurate, and easily seen across the room In bright light. very nice unit.
K. Beard
2025-01-29 11:42:16
The voltage display accuracy leaves something to be desired. Mine is off by 0.03 volts. Everything else is adequate given the price. You will need to make proper leads as the ones provided are woefully undersized in both length and wire guage.
Benshop
2024-12-21 17:18:57
It works fine. Quality seems good. So far so good.
Customer
2024-11-15 17:41:07
I purchased this to use for electrolysis in December instead of a battery charger, this month was the first to try it outdoors in my region. Very disappointed, it would not function as described in the advertising. The amperage can not be set from 0 - 10 as described, it would not go over 1, not working at all for the rust removal process. Lesson learned, waited too long to test it so it can't be returned. It looks nice, all lights work, just does not work for electrolysis. The leads are also very short, the clips seem flimsy
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