HEAVY-DUTY 9-volt Battery for tDCS

TENS CELL tDCS Super Heavy-Duty 9-volt Battery


Limited Availability Product

This is our first time carrying TENS CELL – A premium line of batteries made specifically for therapeutic stimulation applications such as TENS muscle stimulators and tDCS devices!

This is the “SUPER HEAVY-DUTY” Carbon Zinc variant of TENS CELL’s battery line, making it perfect for low current draw applications such as tDCS.


This 9-volt battery will last longer for tDCS than any other battery available. Only a limited supply on hand!

SKU: TENS9v-SA-1 Categories: , ,


This TENS CELL 9-Volt Carbon‑Zinc battery is perfect for Transcranial Direct Current Stimulation, and compatible with all of our tDCS Kits.


Additional information

Weight 1.6 oz
Dimensions 1.04 × 0.69 × 1.83 in




9-volts (at a minimum)


Carbon‑Zinc – 6F22 IEC Standard (mercury and cadmium free)



Our goal is to produce tDCS devices of the highest quality standards, which operate with precision and guaranteed accuracy, therefore we do not include current meters in our products. Analog current meters are incredibly inefficient, and are only required for tDCS devices which do not have proper voltage/current control and adaptation circuitry in place.

The Brain Stimulator tDCS devices include enhanced circuitry comprised of precision components, integrated circuits, and microprocessors (“smart” technology) which control and monitor current and voltage levels several times a milliseconds. Through the use of these special technologies, and by nature of design, our products do not require the user to monitor current flow. However, tDCS devices which use rudimentary circuitry must include a current meter, as the user must constantly monitor and adjust the output flow in order for the device to produce accurate current.

In some ways this can be compared to manual (stick shift) cars versus automatic cars. With a manual gear shift automobile, the drive must constantly monitor the state of the automobile to know when he or she needs to change gears (adjust the device). However, cars which utilize automatic shifting do not require the constant attention of the driver as the technology within the car “adjusts” (shifts) itself at the optimal time.


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While saline solution is not strictly required for use with sponge electrodes, it is recommended. Plain water will work in helping the sponge to pass current, just not as well as saline solution. Water in and of itself is a very poor conductor of current. So in using just water, you’re essentially asking the sponge alone to work to pass current to the targeted area. By adding salt to plain water (saline solution), the electricity is able to actually jump from molecule to molecule through the solution, providing a better connection. In using a sponge well soaked with saline solution, the current encounters the least amount of resistance, providing the most effective, and most comfortable tDCS experience.

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We recommend using Alkaline disposable 9V batteries for use in our tDCS devices. Alkaline 9V batteries are the standard, over-the-counter batteries which can be purchased at almost any store that carries batteries. Common brands include Duracell, Energizer, Rayovac and others. Out of the various brands of Alkaline 9V batteries available, we personally recommend Duracell’s Procell brand Alkaline 9V Batteries. This is the only battery that we personally use, and the only battery that we stock in our online store. There are several different factors why we recommend this type and brand of battery such as longevity, reliability, power, and affordability. More information on Duracell Procell 9V batteries can be found on the product’s listing page.

Regardless of the brand of battery you choose, we strongly recommend not using rechargeable batteries for tDCS. One reason for this is that these batteries are rarely charge to the full 9-volts, which prevents the user from effectively engaging in tDCS montages where electrodes are father apart. Essentially, the higher the voltage, the more effective the battery is at passing current over farther distances.

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It’s actually fairly common for individuals using well soaked sponge electrodes to not feel much of anything when engaging in tDCS. Sometimes you may  notice a sensation when first turning on the device, which may fade away over the course of the session. This is due to the cells in your body aligning to allow the current to pass through with less resistance. Additionally, we’ve found that over time the body becomes less sensitive to the feelings associated with tDCS. If you’ve been using tDCS for some time and no longer feel anything, even when replacing the battery, it’s very possible that you’ve just become used to the sensations. We can assure you that there is little to no possibility that your device has “gone bad” as we have individuals who have been using our products for years and still experience all of the wonderful effects that can be associated with tDCS.

If you’re still suspicious that maybe your device isn’t producing current, there’s a simple way that you can test to ensure current is flowing. Install a new battery in your device and remove any electrodes or adapters from the electrode lead wires. While this next part may sound a little weird, it’s completely harmless. Turn the device on and to the lowest setting, and lightly lick the two electrode leads with your tongue. You should feel a slight tingle on your tongue (less than the sensation of licking a 9 volt battery, if you ever did that as a kid).

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