Build Battery Packs

Cells

• DIY500AMP.COM
• Order #1584 Estimated Thursday, Sep 25
• Ampace JP40 "LT Wrap" 21700 4000mah 70A Battery - Tabless Cell × 120
• Subtotal $474.00 Shipping $22.99 Total $496.99 USD

Welder

• Heltec HT-SW02H
• Order #114-4340207-9060214 October 30, 2025
• Spot Welder & Milliohm Meter
• 42 KW 7000A Capacitor Energy Storage Pulse Welding Machine
• Subtotal $729.90 Tax: $43.79 Total: $773.69

Battery Case

• 15 cell m18 kit (8 batteries)
• $389.20

Cost

• Me: $497+$497+$774+774+$390=$1660
• Milwaukee (with worse cells): $279*8=$2232

Assembly

• video
• cell orientation
• bottom contacts
• top contacts
• side board
• soldering 4 contacts to the board
• obliterating this bit contact for some reason
• case with pastic bits and springs
• second plastic thing goes into the springs, then 4 tiny screws