Credit: Thon

TLDR - ONYX Tabless Lithium Battery

Think Tesla-style tabless cells-just in a shape that fits ONYX perfectly. Tabless + verified = ONYX gold. The tabless BAK 50D and 45D are powerhouse drop-in upgrades for any ONYX RCR running 21700 NMC cells. But here’s the deal-not all “30A-rated” cells perform the same.

30A from a Samsung 50S is like swinging a wiffleball bat-gets the job done, but not built to hit hard. Now 30A from a P45B, P50B, 50PL, 40PL, or BAK 50D & 45D? That’s like swinging an iron rod-rigid, unshakable, and made to take serious punishment without flinching.

Same amp rating, completely different performance under real-world stress.

Notes Cell Cap. Cont. Burst
Tabless BAK 50D 5000mAh 60A 100A
Tabless EVE 50PL 5000mAh 45A 80A
Tabless EVE 40PL 4000mAh 45A 70A
Tabless BAK 45D 4500mAh 35A 60A
Molicel P50B 5000mAh 35A 60A
Molicel P45B 4500mAh 35A 45A
Molicel P42A 4200mAh 30A 45A
Samsung 50S 5000mAh 25A 30A

ONYX Tabless Lithium Battery

The ONYX RCR uses standard 21700-format lithium-ion cells, and both the tabless BAK 45D (4500mAh) and BAK 50D (5000mAh) match that size-so they drop right into existing battery layouts. They’re fully compatible with custom or aftermarket packs.

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Using BAK 45D or 50D tabless cells in an ONYX RCR isn’t just possible-it’s one of the most advanced battery upgrades you can do. The 45D is ideal for powerful daily rides and mid-tier racing builds, while the 50D is made for riders chasing maximum torque, speed, and output-perfect for field weakening, hard launches, and track-level performance.

Benefits of Using Tabless

  • Lower Internal Resistance: More efficient current flow, less voltage sag under load
  • Higher Discharge Output: Sustains 35A–60A per cell, ideal for high-performance builds, racing, or FW
  • Cooler Running: Tabless design spreads heat better = lower temps under full throttle
  • Better Lifespan Under Stress: Less heat = less cell degradation over time
  • More Consistent Power Delivery: You get smoother acceleration, especially at high speeds or low state of charge

Tabless Lithium Cells

A “tables lithium battery” likely refers to a “tabless lithium battery”-a concept popularized by Tesla’s 4680 battery cell design.

What is a Tabless Lithium Battery?

In traditional lithium-ion cells, internal current collector tabs connect the battery’s internal layers (anode and cathode) to the terminals. These tabs are like bottlenecks-they limit how fast power can flow and create heat.

A tabless design eliminates these bottlenecks by allowing current to flow evenly across the entire surface of the electrode. It’s like upgrading from a two-lane road to a ten-lane highway.

Why is Tabless Better?

  • Less resistance = more efficiency
  • Better cooling = more power
  • Faster charging and discharging
  • Higher performance in electric vehicles and high-drain applications

Tesla’s 4680 Cell as an Example

Tesla’s 4680 tabless cell uses a jellyroll design where the electrode layers are laser-patterned to remove the need for tabs. That’s how they:

  • Increased range
  • Boosted power
  • Reduced manufacturing costs