Keep your battery secure — wherever you park.
The katt'fix battery lock gives your Tern GSD added peace of mind, securing the battery to the frame so you can leave your bike unattended with confidence. No drilling, no modification — just a smart, clamp-style lock that sits neatly between the frame and the battery, protecting one of the most valuable parts of your eBike.
Key Features
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Theft-resistant battery lock designed specifically for Tern GSD
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Neat clamp-mount design — no permanent installation required
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Keeps the battery firmly in place, yet quick to remove when needed
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100mm discreet profile that blends cleanly with the frame
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Foam inserts protect the frame and battery housing from wear
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Available for Gen 2 (–2024) and Gen 3 (2025->) models
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Compatible with multiple Bosch battery formats (options selectable above)
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Optional AirTag tray for added recovery protection
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Supplied with two keys
We Fit Accessories
When you order parts and accessories with your bike, we’ll fit them for you wherever possible, so your bike arrives ready to ride.
Convenient Collection Options
Prefer to collect in person? Choose to pick up your items from any Fully Charged store, including locations in London, Silverstone, Guildford, Cornwall, or the New Forest.
Fast Dispatch
Orders are typically dispatched within 1–3 working days. Tracking information will be provided for all orders once your package leaves us.
Free Mainland UK Delivery
Enjoy free delivery on orders over £100 across Mainland UK. For Northern Ireland, Channel Islands, and the Scottish Highlands, a courier charge applies.
If you're not completely satisfied with your purchase, you have 14 days from the date of receipt to cancel, return, or exchange your order, excluding custom-built or personalised items. To initiate a return or exchange, please contact Fully Charged via email or phone with your order details. Return the goods within 14 days at your expense, and we'll refund you via the original payment method, minus any costs for damage or devaluation.
Specifications
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