21700 Busbar Orientation Guides

Configuration

DIY kits · 2P

2S2P busbar orientation

See the 21700 cell orientation, copper busbars, slotted stainless-steel weld layer, and front power-lead positions for this DIY kit.

Design review example — check against the supplied parts before assembly

Planning estimate for an assembled core with 21700 cells: approximately 47 × 47 × 72 mm (W × L × H) and 288–340 g. Excludes cable projections and shipping box; not a measured or shipping weight.

2S2P 21700 kit front assembly example showing the copper busbars, slotted stainless steel overlays, and power leads — **Assembly view** Front perspective with busbars, stainless-steel overlays, and cable positions.

2S2P 21700 kit cell polarity example showing positive and negative ends — **Cell polarity view** Compare the positive and negative cell ends before placing each busbar.

The JST lead is not a BMS. Confirm smart-charger compatibility and pinout, then verify cell polarity, insulation, metal layers, and front cable weld points against the supplied parts before welding. A slotted stainless-steel layer sits over the copper to make spot welding easier and improve corrosion protection. Both layers have centered 0.8 × 7 mm slits. Metal thickness can vary; image proportions are illustrative.

View and print the 2S2P guide View 2S2P kit

DIY kits · 2P

3S2P busbar orientation

See the 21700 cell orientation, copper busbars, slotted stainless-steel weld layer, and front power-lead positions for this DIY kit.

Design review example — check against the supplied parts before assembly

Planning estimate for an assembled core with 21700 cells: approximately 47 × 70 × 72 mm (W × L × H) and 432–510 g. Excludes cable projections and shipping box; not a measured or shipping weight.

3S2P 21700 kit front assembly example showing the copper busbars, slotted stainless steel overlays, and power leads — **Assembly view** Front perspective with busbars, stainless-steel overlays, and cable positions.

3S2P 21700 kit cell polarity example showing positive and negative ends — **Cell polarity view** Compare the positive and negative cell ends before placing each busbar.

View and print the 3S2P guide View 3S2P kit

DIY kits · 2P

4S2P busbar orientation

See the 21700 cell orientation, copper busbars, slotted stainless-steel weld layer, and front power-lead positions for this DIY kit.

Ready to pack guide — verify cell polarity and supplied parts before welding

Planning estimate for an assembled core with 21700 cells: approximately 47 × 95 × 72 mm (W × L × H) and 576–680 g. Excludes cable projections and shipping box; not a measured or shipping weight.

4S2P 21700 kit front assembly example showing the copper busbars, slotted stainless steel overlays, and power leads — **Assembly view** Front perspective with busbars, stainless-steel overlays, and cable positions.

4S2P 21700 kit cell polarity example showing positive and negative ends — **Cell polarity view** Compare the positive and negative cell ends before placing each busbar.

View and print the 4S2P guide View 4S2P kit

DIY kits · 2P

5S2P busbar orientation

See the 21700 cell orientation, copper busbars, slotted stainless-steel weld layer, and front power-lead positions for this DIY kit.

Design review example — check against the supplied parts before assembly

Planning estimate for an assembled core with 21700 cells: approximately 47 × 115 × 72 mm (W × L × H) and 720–850 g. Excludes cable projections and shipping box; not a measured or shipping weight.

5S2P 21700 kit front assembly example showing the copper busbars, slotted stainless steel overlays, and power leads — **Assembly view** Front perspective with busbars, stainless-steel overlays, and cable positions.

5S2P 21700 kit cell polarity example showing positive and negative ends — **Cell polarity view** Compare the positive and negative cell ends before placing each busbar.

View and print the 5S2P guide View 5S2P kit

DIY kits · 2P

6S2P busbar orientation

See the 21700 cell orientation, copper busbars, slotted stainless-steel weld layer, and front power-lead positions for this DIY kit.

Design review example — check against the supplied parts before assembly

Planning estimate for an assembled core with 21700 cells: approximately 47 × 140 × 72 mm (W × L × H) and 864–1020 g. Excludes cable projections and shipping box; not a measured or shipping weight.

6S2P 21700 kit front assembly example showing the copper busbars, slotted stainless steel overlays, and power leads — **Assembly view** Front perspective with busbars, stainless-steel overlays, and cable positions.

6S2P 21700 kit cell polarity example showing positive and negative ends — **Cell polarity view** Compare the positive and negative cell ends before placing each busbar.

View and print the 6S2P guide View 6S2P kit

DIY kits · 2P

7S2P busbar orientation

See the 21700 cell orientation, copper busbars, slotted stainless-steel weld layer, and front power-lead positions for this DIY kit.

Design review example — check against the supplied parts before assembly

Planning estimate for an assembled core with 21700 cells: approximately 47 × 163 × 72 mm (W × L × H) and 1008–1190 g. Excludes cable projections and shipping box; not a measured or shipping weight.

7S2P 21700 kit front assembly example showing the copper busbars, slotted stainless steel overlays, and power leads — **Assembly view** Front perspective with busbars, stainless-steel overlays, and cable positions.

7S2P 21700 kit cell polarity example showing positive and negative ends — **Cell polarity view** Compare the positive and negative cell ends before placing each busbar.

View and print the 7S2P guide View 7S2P kit

DIY kits · 2P

8S2P busbar orientation

See the 21700 cell orientation, copper busbars, slotted stainless-steel weld layer, and front power-lead positions for this DIY kit.

Design review example — check against the supplied parts before assembly

Planning estimate for an assembled core with 21700 cells: approximately 47 × 185 × 72 mm (W × L × H) and 1152–1360 g. Excludes cable projections and shipping box; not a measured or shipping weight.

8S2P 21700 kit front assembly example showing the copper busbars, slotted stainless steel overlays, and power leads — **Assembly view** Front perspective with busbars, stainless-steel overlays, and cable positions.

8S2P 21700 kit cell polarity example showing positive and negative ends — **Cell polarity view** Compare the positive and negative cell ends before placing each busbar.

View and print the 8S2P guide View 8S2P kit

1P · DIY kits and custom-built packs

2S1P busbar and cell layout

The same 1P layout is offered as a loose-parts DIY kit or an in-house custom-built pack. Choose the product that matches how you want it supplied.

Design review rendering — final build may differ

Planning body envelope: 46.4 × 25.9 × 72 mm (W × L × H). Loose kit parts: approximately 30–60 g without cells; custom-built pack with cells: approximately 164–210 g. These are engineering estimates, not measured or shipping weights.

2S1P 21700 copper and slotted stainless-steel busbar layout with front power leads — **Copper and stainless-steel layout** 3D front view showing the metal layers and the positive and negative cable positions.

2S1P 21700 cell polarity layout on both pack faces — **Cell polarity layout** Both pack faces show the intended 21700 cell-end orientation before the metal layers are fitted.

DIY kits are loose parts without cells; custom-built packs include the selected cells and are assembled in-house. No BMS is included. The JST balance lead is for a compatible smart charger only; verify its pinout. A slotted stainless-steel layer sits over the copper to make spot welding easier and improve corrosion protection. Both layers have centered 0.8 × 7 mm slits. Metal thickness can vary; image proportions are illustrative.

View and print the 2S1P guide View 2S1P kit View 2S1P custom pack

1P · DIY kits and custom-built packs

4S1P busbar and cell layout

The same 1P layout is offered as a loose-parts DIY kit or an in-house custom-built pack. Choose the product that matches how you want it supplied.

Design review rendering — final build may differ

Planning body envelope: 46.4 × 48.6 × 72 mm (W × L × H). Loose kit parts: approximately 40–75 g without cells; custom-built pack with cells: approximately 308–375 g. These are engineering estimates, not measured or shipping weights.

4S1P 21700 copper and slotted stainless-steel busbar layout with front power leads — **Copper and stainless-steel layout** 3D front view showing the metal layers and the positive and negative cable positions.

4S1P 21700 cell polarity layout on both pack faces — **Cell polarity layout** Both pack faces show the intended 21700 cell-end orientation before the metal layers are fitted.

View and print the 4S1P guide View 4S1P kit View 4S1P custom pack

1P · DIY kits and custom-built packs

5S1P busbar and cell layout

The same 1P layout is offered as a loose-parts DIY kit or an in-house custom-built pack. Choose the product that matches how you want it supplied.

Concept rendering — final physical layout under review

Planning body envelope: 46.4 × 69.4 × 72 mm (W × L × H). Loose kit parts: approximately 45–85 g without cells; custom-built pack with cells: approximately 380–460 g. These are engineering estimates, not measured or shipping weights.

5S1P 21700 copper and slotted stainless-steel busbar layout with front power leads — **Copper and stainless-steel layout** 3D front view showing the metal layers and the positive and negative cable positions.

5S1P 21700 cell polarity layout on both pack faces — **Cell polarity layout** Both pack faces show the intended 21700 cell-end orientation before the metal layers are fitted.

View and print the 5S1P guide View 5S1P kit View 5S1P custom pack

1P · DIY kits and custom-built packs

6S1P busbar and cell layout

The same 1P layout is offered as a loose-parts DIY kit or an in-house custom-built pack. Choose the product that matches how you want it supplied.

Design review rendering — final build may differ

Planning body envelope: 46.4 × 71.4 × 72 mm (W × L × H). Loose kit parts: approximately 50–95 g without cells; custom-built pack with cells: approximately 452–545 g. These are engineering estimates, not measured or shipping weights.

6S1P 21700 copper and slotted stainless-steel busbar layout with front power leads — **Copper and stainless-steel layout** 3D front view showing the metal layers and the positive and negative cable positions.

6S1P 21700 cell polarity layout on both pack faces — **Cell polarity layout** Both pack faces show the intended 21700 cell-end orientation before the metal layers are fitted.

View and print the 6S1P guide View 6S1P kit View 6S1P custom pack

1P · DIY kits and custom-built packs

7S1P busbar and cell layout

The same 1P layout is offered as a loose-parts DIY kit or an in-house custom-built pack. Choose the product that matches how you want it supplied.

Concept rendering — final physical layout under review

Planning body envelope: 46.4 × 94.1 × 72 mm (W × L × H). Loose kit parts: approximately 55–105 g without cells; custom-built pack with cells: approximately 524–630 g. These are engineering estimates, not measured or shipping weights.

7S1P 21700 copper and slotted stainless-steel busbar layout with front power leads — **Copper and stainless-steel layout** 3D front view showing the metal layers and the positive and negative cable positions.

7S1P 21700 cell polarity layout on both pack faces — **Cell polarity layout** Both pack faces show the intended 21700 cell-end orientation before the metal layers are fitted.

View and print the 7S1P guide View 7S1P kit View 7S1P custom pack

1P · DIY kits and custom-built packs

8S1P busbar and cell layout

The same 1P layout is offered as a loose-parts DIY kit or an in-house custom-built pack. Choose the product that matches how you want it supplied.

Concept rendering — final physical layout under review

Planning body envelope: 48.4 × 93.6 × 72 mm (W × L × H). Loose kit parts: approximately 60–115 g without cells; custom-built pack with cells: approximately 596–715 g. These are engineering estimates, not measured or shipping weights.