Spare battery for long-neck angle grinder, art. no. 21829

Replacement Battery for Long-Neck Angle Grinder – Item No. 21829

Reliable power supply for continuous work

The replacement battery for the Long-Neck Angle Grinder (Item No. 21829) is the ideal power source for professionals working in tiling, drywall installation, and renovation who use the Karl Dahm cordless long-neck angle grinder. It provides exactly the power you need for uninterrupted grinding, cutting, and processing – without unnecessary downtime or performance loss.

With this high-quality replacement battery, you can ensure your long-neck angle grinder is always ready for use – especially during extended jobs or on large-scale construction sites where quick charging cycles and high availability are crucial.

For demanding professional applications
Whether you're precisely grinding tile edges, working with natural stone, or cutting construction materials, this replacement battery fully supports all typical uses of the cordless long-neck angle grinder. Its performance is tailored to the needs of professional tilers, stonemasons, and tradespeople.

Especially in situations where mains power is unavailable or impractical, this battery proves to be a flexible and mobile energy source. Swapping batteries is quick and easy, ensuring uninterrupted workflow – a decisive advantage when working to tight deadlines.

Technical Specifications at a Glance

• Voltage: 10.8 V

• Type: Lithium-ion battery (Li-Ion)

• Weight: Lightweight design for comfortable handling

• Charging Time: Short, when used with a compatible charger (e.g. Item No. 41812)

• Compatibility: Suitable for Karl Dahm Long-Neck Angle Grinder Item No. 41813 and Battery Set Item No. 41812

Advantages over conventional batteries

• Premium cell technology: Ensures stable performance over many charging cycles

• No memory effect: Full capacity with every charge

• Compact design: Enables fatigue-free work, even in overhead applications

Usage Tips & Maintenance Advice

• Storage: Keep dry, frost-free, and not in a fully discharged state

• Charger recommendation: Ideally use the charger from Set Item No. 41812

• Regular use: Extends battery lifespan and maintains performance

• Cleaning: Use a dry cloth only; avoid harsh cleaning agents

Additional Accessories

• Battery and Charger Set (Item No. 41812): Perfect for expanding your equipment or outfitting your workshop

• Long-Neck Angle Grinder Set with Batteries & Charger (Item No. 41823): The original tool for professional use

FAQ – Frequently Asked Questions about Replacement Battery Item No. 21829

1. Is the replacement battery compatible with other Karl Dahm devices?
   This battery is specifically designed for the Long-Neck Angle Grinder Item No. 41813. Compatibility with other devices should be confirmed with Karl Dahm customer service.

2. What is the charging time for the battery?
   Charging is typically completed in under 60 minutes, provided a suitable charger is used.

3. Can the battery be charged while in use?
   No, the battery must be removed from the device for charging. Using a second battery enables continuous operation.

4. Does the battery have a charge level indicator?
   The battery includes an integrated LED indicator for current capacity (model-dependent).

5. How many times can the battery be recharged?
   When used properly, the battery can last through several hundred charging cycles.

6. Is the battery suitable for wet applications?
   No, it is intended for dry environments only.

7. How should the battery be stored?
   Ideally stored at room temperature in a frost-free environment and not fully discharged.

8. How can I tell if a battery is worn out?
   Signs include reduced performance, frequent recharging, or swelling.

9. Is there a warranty for the replacement battery?
   Yes, the statutory warranty applies. Please refer to Karl Dahm’s service terms.

10. Why should I use a genuine Karl Dahm battery?
    Only original batteries ensure full performance and safety for your tools. They are precisely matched to Karl Dahm equipment.