Baseus Battery Holder for Positive Grid Spark Amp

Hello, everyone! I'm a maker that has recently gotten into guitars. I purchased the Positive Grid Spark amp for my guitar in December and joined the Positive Grid Spark Communities online. One of the more popular “mods” to the amp is to power it via 65W, 19V battery bank. 

I acquired a Baseus 65W 20kmAH battery pack, and decided to design a 3D Printable battery holder that could be held to the back of the amp via screws. This battery holder makes the amp completely portable. As an added, unintended benefit, it also makes for an extremely stable rear “leg” for the amp to lean back on. This allows you to set the amp on the ground and have the highly directional speakers face you while you play standing or sitting. 

This battery holder is designed for the 65W, 20000mAH Baseus battery only! (model:  PPADM65-S). This will NOT fit any of the Talentcell batteries or the 30,000mAH Baseus battery on Amazon. 

The batter holder uses tight tolerances and a friction fit to securely hold the battery. Depending on the dimensional accuracy of your 3D printer and the manufacturing tolerances of the Baseus Battery packs, it is highly recommended that you print the 1in test print to check fit first! It will save you about 9.5 hrs of printing time on a Mk3s printer. 

Once the test print is complete, slide it over the battery pack to check fit. Use a pair of calipers to check the thickest part of the pattery pack, and measure the internal size of the test print. Use some math to determine a scaling factor to get a battery holder that will work for your battery pack! 

I also recommend printing the battery holder standing vertically, with the long side parallel with the Y-Axis of the printer. This will help prevent tipping with the motion of the Y-axis going back and forth. (See the picture for referenc orientation). Also, the there is very limited surface area on the model to print from. I highly recommend calibrating your Z-layer height, and using a 5mm brim on the print to maximize adhesion and resist curling on the print. Otherwise, you will end up with a spaghetti monster. Ask me how I know. 

Options on the file: For a little bit of style, I've added a version with a Strat-Style Guitar embossed on the face of the battery holder, and one with out. When I have time, I may upload alternate versions with different guitars, like a Tele-style, Single-Cut (LP), or Doublecut (SG) style shapes. No promises though. 

Also optional, is a wireless guitar jack caddy that connects via one screw and two teeth that interlock with the back of the battery pack. Use this to make you Spark Amp truly grab and go! You may have to ream the diameter of the ¼" jack holders with a drill bit to make it work. The cool part is that if you print it and decide you don't like it, you can remove it and not have to worry about re-printing the battery holder. 

The battery holder attaches to the back of the amp view the two screws in the center and one screw for the optional wireless guitar jack holder. When securing the battery pack to the amp, DO NOT OVERTIGHTEN THE SCREWS!! They are woodscrews and can potentially strip out the holes in the MDF. Just gently snug the screws in place. 

I accept no liability for any damage these mods may or may not make to your Spark Amp or wireless jacks. Proceed at your own risk! 

I may print and sell these myself if there is enough interest. Stay tuned.