[This review was collected as part of a promotion.] My fiancé is really enjoying his experience with the Bosch 18V COREB 18V Lithium-Ion 4.0 Ah Compact Battery. It gives him great battery power without all of the normal battery weight. He’s used it to finish jobs around the house, such as putting up and taking down light fixtures. It’s also being utilized to repair the porch lattice. I would recommend it to my friends and family.

[This review was collected as part of a promotion.] The Core 18V 4.0ah with 800 watts of power is exactly what my project needed. I recommend this battery for any weekend warrior project or task. During my DIY project of creating a custom cat tree/tower for my 2 cats and a fun relaxation station for my pup I never ran out of juice or power required. This battery has the power and longevity to help you from start to finish. I found myself needing a recharge before the battery, which is amazing. I noticed that even when the battery was reaching the level of needing to be charged soon. I had no loss of power or performance. It performs at optimum capacity all throughout. Incredibly happy and pleased! With its longevity and necessary power, it does not take a long time to charge and be put back into action.

[This review was collected as part of a promotion.] I love that this battery has a quick and easy charge but last for a long time. I fully charged it and it lasted me all day long on the job. I also like that I had no worries about an over charge. I will definitely be buying more Bosch tools in the future after trying out my new brad nailer. I am stoked to get some more jobs done.

[This review was collected as part of a promotion.] This Bosch 18V Advanced Power Battery is a game-changer when paired with the Bosch cordless tools — especially the Bosch 18V Laminate Trim Router. The battery delivers consistent power and impressive runtime, even when tackling tougher materials or extended jobs. I’ve been using it regularly with the trim router and the Carbide 2-Flute Flush Trim Bit, and the whole setup feels like a well-matched system. The battery fits snugly, charges quickly with the standard charger, and gives me plenty of time to complete my work without needing to stop and swap batteries. Even under heavy use, it doesn’t overheat or fade — it holds its charge well and performs with the same power output start to finish. I also appreciate the battery level indicator, which is actually accurate and super helpful for planning your day. If you're already invested in Bosch 18V tools or looking to build a cordless setup, this battery is a must-have. It really brings out the best in the trim router and other compatible tools. Bosch nailed it with this one.