Lightweight Lithium Battery 6Ah from Ninemeister. Porsche 911 / Boxster / Cayman  ❭  9M9A791510500

9m Lightweight Lithium Battery – Maximum Weight Saving, Instant Starting Power

The 9m lightweight lithium battery is a high-performance electrical upgrade designed for Porsche 911, Cayman and Boxster models. Developed in the UK, this advanced battery offers a minimum 50% weight saving compared to conventional lead-acid and AGM batteries, while delivering outstanding starting performance and modern user-friendly features.

Fits:
Porsche 964
Porsche 993
Porsche 996
Porsche 997
Porsche 991
Porsche 986 Boxster
Porsche 987 Boxster / Cayman
Porsche 981 Boxster / Cayman
Porsche 718 Boxster / Cayman

Weighing just 8.6kg, the 9m lithium battery significantly reduces vehicle mass—improving throttle response, handling balance and overall driving dynamics. Despite its compact weight, it provides an impressive 1330 cold cranking amps (CCA) and 60Ah capacity (120Ah PBeq equivalent), ensuring reliable starts even in demanding conditions.

Battery Dimensions - 276 x 175 x 190mm

What the 9m Lightweight Lithium Battery Does

This performance battery:

• Supplies high cranking power for fast, confident engine starts
  
• Reduces overall vehicle weight, improving performance and handling
  
• Maintains stable voltage output under load
  
• Provides modern monitoring features via an LCD touchscreen display
  
• Allows emergency restart using the integrated jump-start button
  
• Fits directly in place of the original-fit battery with no modifications

Ideal for road, fast-road and track-focused Porsche applications.

Why Traditional Batteries Fail

Conventional lead-acid and AGM batteries commonly fail due to:

• Excessive weight, impacting vehicle performance
  
• Voltage drop over time, especially during storage
  
• Poor tolerance to repeated discharge cycles
• Heat sensitivity, accelerating internal degradation
  
• Reduced cold cranking performance as the battery ages

These issues are particularly noticeable in performance-oriented Porsche models.

Why the 9m Lithium Battery Should Be Fitted

Upgrading to the 9m lightweight lithium battery delivers:

• Over 50% weight reduction compared to traditional batteries
  
• Exceptional 1330 CCA starting power
• Compact, efficient design (276 × 175 × 190mm)
  
• Direct replacement fitment for easy installation
  
• Integrated LCD voltage display & restart button
• 2-year limited warranty for peace of mind

This battery is an ideal solution for owners seeking improved performance, reliability and modern battery technology.