18650 Battery Adapter for NDS Lite

prusaprinters

<p>The NDS Lite is a great little machine but now it's hard to find working batteries for this thing. You go online to buy a battery advertised as 800mah but it comes as 400mah because it's been sitting in the warehouse for 5 years. Well forget that, just hack in a fresh 2400mah 18650 battery instead! It's still lithium so it recharges with the original recharging cable too.</p> <h3>Print instructions</h3><h3>Category: Video Games Summary</h3> <p>The NDS Lite is a great little machine but now it's hard to find working batteries for this thing. You go online to buy a battery advertised as 800mah but it comes as 400mah because it's been sitting in the warehouse for 5 years. Well forget that, just hack in a fresh 2400mah 18650 battery instead! It's still lithium so it recharges with the original recharging cable too.</p> <h3> Print Settings</h3> <p><strong>Rafts:</strong> No</p> <p><strong>Supports:</strong> No</p> <p><strong>Resolution:</strong> 0.2</p> <p><strong>Infill:</strong> 15%</p> <p><strong>Notes:</strong></p> <p>Designed for PETG for its flexability and good layer adhesion - my material of choice.</p> <h3> Post-Printing</h3> <p><strong>Assembly</strong></p> <ol> <li>Solder 2 pieces of wire about 5-10cm, each with a small spring on one end and a small strip of copper on the other.</li> <li>Wrap the strip of copper on the fake battery and glue it on the backside so the NDS's contacts can touch them when the battery is inserted.</li> <li>Insert the fake battery and leave the wires passing through its central hole. Secure the wires onto the fake battery with glue gun or your adhesive of choice.</li> <li>Remove the securing screw from the original lid and transfer it over to the new lid.</li> <li>Install the new lid, using the screw to secure the new lid just like the original.</li> <li>Insert the 18650 cell into the battery bay (cyltop) with the sprint contacts in the correct orientation. Note that the + terminal is closer to the back of the NDS so ensure this terminal is connected to the + of the battery.</li> <li>Squish the excess wire into the battery bay and install the small battery lid (cylbotlid).</li> <li>Mate the battery bay to the protruding fake battery and insert the M2 screws to secure.<h3>How I Designed This</h3> </li> </ol> <p><strong>Tools used:</strong></p> <p>Fusion 360, vernier Calipers, cell phone camera, sheer autistic perfectionism</p> <h3> Ingredients</h3> <p><strong>Non printed ingredients</strong></p> <p>1x PROTECTED 18650 cell, usu. for flashlights.<br/> 2x copper strips for interfacing the battery contacts in the NDS<br/> 2x wire<br/> 2x spring for interfacing the 18650 cell<br/> 1x original securing screw from the NDS battery bay lid<br/> 2x 4mm M2 Screw</p> <h3> DO NOT MESS THESE UP:</h3> <p><strong>Ensure that...</strong></p> <p>... the 18650 cell is protected, i.e. has overvoltage and undervoltage protection, not flat top raw cells.<br/> ... the M2 screws are not long enough to scratch the 18650 cell when installed. Shorter than 5mm is fine.<br/> ... the polarity of the battery is correct when installing, or you could damage your NDS lite.</p>