I recently purchased a Dewalt DCL050 light and while reading reviews there seemed to be a lot of questions about current draw \/ battery life. Dewalt claim a maximum of 22 hours but that’s about all I could find in official documentation so I thought I’d attach it to a lab power supply and measure what it actually draws. I had the PSU set to 18V which is the nominal voltage and results were as follows:<\/p>\n
Low setting (250 lumens) = 240 mA
\nHigh setting (500 lumens) = 460 mA<\/p>\n
With the low setting the instantaneous current draw skips around because of the PWM used to dim the LEDs so the above is a 10 second average. The largest Dewalt battery is 5 Ah and 5 \/ .24 = 20.8 so the 22 hour maximum sounds plausible given that batteries are normally rated for a 10 hour discharge and often perform a little better at lower discharge rates. Here’s a little table of roughly what it would be for the common battery capacities that I know of:<\/p>\n
Capacity (Ah) Low setting High setting\n1.3 5 hrs 3 hrs \n 2 8 hrs 4 hrs\n 3 13 hrs 7 hrs\n 4 17 hrs 9 hrs\n 5 21 hrs 11 hrs\n 6 25 hrs 13 hrs\n<\/pre>\n","protected":false},"excerpt":{"rendered":"I recently purchased a Dewalt DCL050 light and while reading reviews there seemed to be a lot of questions about current draw \/ battery life. Dewalt claim a maximum of 22 hours but that’s about all I could find in official documentation so I thought I’d attach it to a lab power supply and measure […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[36,4],"tags":[],"class_list":["post-318","post","type-post","status-publish","format-standard","hentry","category-dewalt","category-hardware"],"yoast_head":"\r\n
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