WLToys 1S 3.7V 400mAh LiPo Battery (K127)

Name: WLToys 1S 3.7V 400mAh LiPo Battery (K127)
Brand: XK Innovation
SKU: k127-batt
Price: 205 ZAR
Availability: InStock

R205.00

Tax included

The WLToys 1S 3.7V 400mAh LiPo battery is the correct replacement battery for the K127 RC helicopter, designed to match the stock voltage and capacity for consistent flight performance.

Quantity

In Stock

1 review

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The WLToys 1S 3.7V 400mAh LiPo battery is a replacement or spare battery for the K127 RC helicopter. It uses a single cell 3.7V configuration which matches the K127 power system requirements.

A spare battery is useful for extending flying time between charges, and for keeping a fresh pack ready while another battery is charging. Using the correct voltage helps maintain predictable throttle response and protects the electronics.

Typical uses

Replacement battery for a worn or damaged K127 pack
Spare battery to extend flying time per session
Keeping multiple packs charged for training and practice flights

Key features and specifications

Brand: WLToys
Battery type: LiPo
Cell count: 1S
Voltage: 3.7V
Capacity: 400mAh
Compatibility: K127 RC helicopter

Important notes

Confirm the connector matches your K127 battery before ordering, as connector types can vary by batch
Use only 1S 3.7V batteries with the correct connector for the K127

Reference k127-batt

In stock 1 Item

1 review

Christian K. 12 March 2026

The battery did not fit easily and is very tight once inserted. The performance is like new. The fit will probably improve over time with use.

Reply · James R.

Hey Christian, Thank you for the review. Yes the battery is a tight fit to start with and I am sure they do this on purpose so that you don't lose a battery during flight as you use it. Its good to hear that your flight performance has been restored! Fantastic!