Charge your devices using stored energy from any four AA batteries via the DC 5 V USB Output function. Four eneloop AA batteries will charge a smartphone battery to about 50%*. You can use a mix of four AA batteries of any type (even dry batteries) to charge your phone in an emergency or top up personal devices such as wireless headphones on the go. To use, connect your device via USB cable and press the PUSH DC OUT button until all LEDs on the front turn green. Press again to cancel the DC output.

Note: Do not install batteries other than eneloop and eneloop pro in BQ-CC87 except when using DC 5 V USB Output. Do not charge dry batteries. USB charging cable to connect a compatible device is not included. When the DC 5 V USB Output is used, four LEDs on the charger blink green every two seconds.

* Estimate when recharging a 3.7 V / 2700 mAh smartphone battery with 4x eneloop AA batteries. Varies depending on the environment and battery condition.

BQ-CC87 makes an ideal traveling companion thanks to DC 5 V USB input. You can use your laptop's USB port, a power bank, your phone's AC adapter, or the DC 5 V outlet in your car or airplane seat to charge your eneloop batteries. Since there are always more devices to charge than AC outlets, being able to charge eneloop and other devices with an aftermarket multi-port AC adapter is handy, especially when you travel.

Note: USB power adapter not included.

Insert the batteries into the slots according to the indicated polarity (+/-). When inserting a battery, you should fit the battery's negative terminal end first and then gently press the top of the battery into the slot. Pull out the positive terminal end first when removing the battery.

Note: Inserting the positive (+) terminal end of AAA batteries first may risk damaging the charger.

Connect the charger to a compatible USB power adapter using the supplied USB charging cable. Plug in the USB power adapter to an AC 100–240 V outlet. It's also possible to charge via a computer's DC 5 V USB port.

Note: USB power adapter not included.

The four LED indicators above the slots flash green from left to right for about three seconds while the charger checks the battery status. The remaining capacity of each installed battery is then separately indicated using three different colors (red: less than 20% charged, yellow: 20–80% charged, and green: more than 80% charged). If a battery is approaching the end of its life, the light above its slot flashes yellow. If an invalid battery is inserted or a battery is installed incorrectly, the light above its slot flashes red, and power to that slot is shut down to prevent damage to the battery and charger. If the battery is compatible and installed correctly, and the light flashes red, it has reached the end of its life and cannot be charged.

When a battery is charged, the light above its slot turns off. Smart Charge detects its voltage and stops charging before overflow to protect and extend battery life.