Sometimes its easier with a rechargeable unit, here is the best rechargeable TENS unit under $50, with lots of features and easy to use.
The TEC.BEAN Rechargeable Tens EMS Unit is ideal for pain management and rehabilitation of your joints and muscles. has 16 Modes and 8 Pads – 2 large, 4 medium and 2 small. 2 electric wires that are ½ inch and 1 electric wire ¼ inch, 1 USB cable and AC adapter.
20 levels of adjustable strength, that penetrates muscle group deeper than human hands can
The sensation of massage is very real. You'll wonder who is administering your massage -but it's just the device! It penetrates muscle group deeper than human hands can. When you place electrode pads in the pain points, you will feel instant relaxation and pain relief. 20 level of strength adjustable by increasing or decreasing steadily. Increase "+" button from level 1 through level 20.
16 preprogrammed massage mode, designed for body relaxation
TEC.BEAN tens is with human body simulation technology, bionic technology, bio electricity technology and microcomputer intelligent control technology, help for treating back pain, arthritic or inflamed discs/ joints, shoulder tension and muscle relief.
It is very easy to use and is small and compact it delivers the Neural and Muscular stimulation to override the pain. It is an excellent alternative to narcotic painkillers. The results will vary from person to person; you may only feel relief while the unit is on. For others they may feel its effect even after the unit has been turned off for a while.
This unit is a “pulse massager”, but when the electrodes are placed on the skin it delivers a light current through the electrodes to the skin and tissues just beneath it. Using a tens unit feels like a strange tingling sensation and the intensity can be set high enough to make a muscle twitch
Overall a great option for pain relief and muscle stimulation and is a good buy for a powerful unit