The Bosch GBA 18V 4.0Ah Li‑Ion Battery Pack is a high‑capacity power source built to keep your cordless tools running longer without frequent swaps, giving you more cuts, drills, and jobs finished per charge. It’s a genuine Bosch Professional battery that plugs into the 18V system you already depend on.

When you grab this 18V lithium‑ion battery, you’re getting a part that delivers way more runtime than the older 2.0 Ah units and pairs with every Bosch 18V tool and charger out there — no hassle, no adapters.

Key Features:

• 4.0Ah Capacity - Keeps your tools running significantly longer than 2.0 Ah packs so you can power through jobs without constant recharges.
• COOLPACK Technology - Actively draws heat away from the cells so the battery lasts longer and handles heat better on long cuts.
• 18V Compatibility - Works with the entire Bosch Professional 18V system and AMPShare Alliance tools, so one pack fits all.
• Li‑Ion Chemistry - No memory effect and low self‑discharge means it holds charge well and stays ready for action.
• Compact Build - Packs decent power without being a bulky monster on your belt or tool.

Applications

On jobs where there’s no plug in sight, this Bosch 18V battery pack keeps staple tools like drills, impact drivers, grinders, saws, and multi‑tools running longer so you don’t stop mid‑task. It’s especially handy on sites with heavy drilling into wood, masonry, or metal, and in maintenance gigs where downtime kills productivity.

Why Choose This Model

If you’re swapping out batteries too often and losing momentum, the GBA 18V 4.0Ah pack bridges the gap between lightweight batteries and big brute packs — it gives you runtime without adding unnecessary heft, and Bosch’s cooling tech helps it stay healthier over time.

Technical Specifications Explained

• Voltage: 18V - Delivers the right power level for Bosch 18V tools, keeping performance steady under load.
• Capacity: 4.0Ah - The amp‑hour rating tells you it stores enough juice to seriously extend runtime compared to lower Ah packs.
• Weight ~0.6kg - Heavy enough to hold solid capacity but light enough that your tools don’t feel draggy.
• Li‑Ion Battery Type - Modern chemistry means less self‑discharge and better charge retention between uses.
• CoolPack 1.0 - Heat kills battery life, so this feature helps the pack stay cooler and last longer under hard use.

Who Should Buy This

If you’re tired of stopping every 15–20 minutes to change batteries, then this Bosch 18V 4.0Ah Li‑Ion pack makes sense — professionals and serious DIYers alike will appreciate the extra runtime on demanding tasks.

It’s also a smart upgrade for anyone with an existing 18V Bosch cordless kit looking to balance runtime and size without going straight to big, heavy batteries.