Silvercrest SBK 4.1 B2 Bedienungs- Und Sicherheitshinweise Seite 42

The warranty applies to defects in material or manufacture. This warranty
does not cover product parts subject to normal wear, thus possibly
considered consumables (e.g. batteries) or for damage to fragile parts,
e.g. switches, rechargeable batteries or glass parts.
42 GB/IE