Rechargeable Li‑ion Battery everActive WL-400 400 mAh — compact rechargeable cell

everActive WL-400 is a compact rechargeable Li‑ion battery with a nominal capacity of 400 mAh designed for small electronic devices and portable accessories. The cell delivers stable voltage and repeatable charge cycles, making it suitable for gadgets that require a compact, rechargeable power source. Its small size and Li‑ion chemistry provide a balance of energy density and moderate discharge performance for everyday use.

Advantages

The WL-400 offers the convenience of a rechargeable solution with consistent output over multiple cycles, reducing the need for frequent battery replacements. Its Li‑ion chemistry ensures higher energy density compared with many single-use cells of similar dimensions. The compact form factor simplifies integration into small flashlights, compact radios, wearable devices, and other portable electronics that accept this battery type.

Suitable for

• Small flashlights and keychain torches
• Wearable electronics and health trackers with compatible battery compartments
• Portable audio devices and mini speakers
• Remote controls, sensors, and compact handheld gadgets

Key specifications

• Chemistry: Lithium‑ion (Li‑ion)
• Nominal capacity: 400 mAh
• Form factor: compact cell suitable for small electronic devices
• Intended use: multiple recharge cycles for repeated use
• Typical applications: low- to moderate-drain portable gadgets

How to use

Insert the everActive WL-400 into the device following the correct polarity indicated by the device manufacturer. Charge the battery with a compatible Li‑ion charger designed for small cells; follow the charger manufacturer’s instructions for proper connection and charge rates. Avoid using chargers intended for different chemistries or incompatible cell sizes. Do not force the cell into compartments that do not match its physical dimensions.

Recommendations

Store the battery in a cool, dry place and avoid prolonged exposure to high temperatures. Charge and discharge the WL-400 within the limits specified by your charger and device to prolong cycle life. Dispose of or recycle the battery according to local regulations for lithium‑ion cells. Inspect the cell periodically for signs of damage or swelling and stop use if any abnormalities are observed.