Review on 🔌 StarTech.com 3 ft USB to Type M Barrel 5V DC Power Cable - USB Power Cable - USB (Power Only) (M) to DC Jack 5.5 mm (M) - 3 ft - Molded - Black - USB2TYPEM by Andrew Mclemore

They work great. I've used them to convert 4.5V battery powered devices to a 5V USB plug (links below) connected to an AC USB plug. (Specifically I have converted LED candles and LED light that use 3 AAA batteries.) Link to "HDVD New 10pack 10" (30cm) 2.1 x 5.5mm DC Power Pigtail Female". I have this 10-pack Pack purchased in November 2014 for $6.90 with free shipping: Cable 5.5mm 5VDC - USB 5VDC Male (USB2TYPEM2M) I bought them in November 2014 for $3.12 each with free shipping : http://www.amazon http://www.amazon.de/ .com/dp/B005HY02FW/ref=wl_it_dp_o_pd_nS_ttl?_encoding=UTF8&colid=14QD47WGOMLTX&coliid=I3118JHOSHYHAQLink to "DC Female to 4 Male Power Splitter Cable for CCTV ". Optionally use this to power 4 devices from a single USB AC plug (Warning: too many devices can overload/overheat the USB AC plug!) I got this in November 2014 for 3.83 $ purchased with free shipping: http://www.amazon.com/gp/product/B004EAMFDC/ref=cm_ cr_ryp_prd_ttl_sol_3.