9v Battery (Blue)

I needed to use these batteries for a Tens Unit I have and these last long and are great qualityYou need these for tens unit!! regular 9 v batteries die very fast - 1 time use

Well meets my expectations. My advice would be to purchase another item to go in the package to prevent theft, as the first was taken (employee )& Amazon made right by having another one sent same day.

Do not waste your money, I bought 2 batteries for my tens unit, I only got about 5, 30 min uses from first one and only 4 , 30 min uses from second. It's very important to have strong, batteries that will last multiple uses when it comes to revealing pain or muscle spasm, I was extremely disappointed last night when the second battery gave me nothing, dead battery when I really needed pain relief. Better off going straight to the tens unit web site and buying from them, these must be generic and should be labeled as such. ;(

Replaced old battery works great

I find that these batteries work extremely well for the tens unit. The problem is that if you use the tens unit A LOT like I do, it runs out so quickly. If you do not use an item a lot, this is a fine battery.

Compré la máquina para mis dolores en el cuerpo pero dejé la batería en la máquina y no prendía. Compre los repuestos, debes tenerlos por si acaso y ahora si me percato de no dejarlos dentro del dispositivo para que no se dañe.

Nice battery. As described by seller. Purchased for my TENS unit

Just as ordered