Due to the ongoing severity of the COVID-19 epidemic, we are temporarily suspending our operations. While we will not be accepting any orders or returns, we are available to assist current customers as needs arise.

This was not an easy decision, however we have always held a strong stance that safety is of paramount priority when it comes to Transcranial Direct Current Stimulation (tDCS). We have gone to extensive lengths to ensure our products are safe, our customers stay safe, and have even blown the whistle when finding other companies selling risky, sub-par tDCS devices. As we monitored the progression of the COVID-19 virus, we quickly realized we would be hypocrites if we ignored the situation.

For the safety of not only our employees and vendors, but our customers and society as a whole, we are suspending operations for now. These are unprecedented times, but we don't have to endure them alone. We are all in this together. From Los Angeles to Beijing, it matters not what your gender is, your race, religion, or economic status... we all can make a difference.

Please, stay home when you can. Practice social distancing, wash your hands often, and BE KIND to your neighbor. And as always, thank you for being a part of The Brain Stimulator Family :)

Replacement Sponge Inserts Subscription Plan

SKU: Sponge3x3-Sub1mo

$19.99 $14.95 / month

With our new subscription program you’ll never have to worry about running out of fresh electrode sponges again!

Over time, electrode sponges lose their integrity, leading to uneven current distribution and less effective tDCS sessions. In addition, using degraded sponges can sometimes cause tingling or itching sensations, especially during the start and end of tDCS sessions.

We recommend replacing electrode sponges every few tDCS sessions. However, best results can be obtained by using new sponges for each stimulation session.

Compatible with: All Sponge Electrodes


These sponge inserts are used to replace the original sponges that come within our sponge electrodes. It’s important to regularly replace your electrode sponges for hygiene purposes, stimulation comfort, and general effectiveness of your tDCS sessions.

While sponges can technically be re-used, you will notice they quickly lose their absorption qualities, often leading to splitting and crumbling. This degradation causes uneven current distribution across the surface of the electrodes. Uneven current distribution not only greatly reduces the effectiveness of the electrodes, but can sometimes result in uncomfortable tDCS session. Users have reported effects such as tingling, itching, and sometimes mild stinging at the site of the electrodes.

Therefore, it’s a good idea to replace your sponges regularly to ensure your electrodes function properly for optimal tDCS sessions. We suggest replacing electrode sponges every few sessions, with the best results occurring when new sponges are used for each stimulation session.

Additional information


Amrex Electrotherapy

Sponge Size

3×3 inches

Compatible with:

3×3" Amrex Sponge Electrodes

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