User manual SONY NP-QM71D

[. . . ] PNote When charging the battery after it has not been used for a long period of time, the LEDs may not light immediately after the start of charging or during charging; this is not a malfunction. When the Check Capacity button (PUSH) B is pushed, LED C lights for about 3 seconds. [. . . ] ⷠKeep the battery pack away from fire. ⷠNever expose the battery pack to temperature above 60 °C (140 °F), such as in direct sunlight or in a car parked in the sun. ⷠKeep the battery pack dry. ⷠStore the battery pack out of the reach of small children. ⷠDo not expose the battery pack to any shock or force such as hammering, dropping or stepping on it. Refer to the operating instractions of your electronic device for further details. Effective use of the battery pack To conserve battery power, we recommend that you keep the battery pack warm, for example in your pocket, and only insert it in your electronic device just before use. ⷠHave spare battery packs handy for two or three times the expected recording time, and make trial recording before taking the actual recording. How to store the battery pack Fully charge the battery and then fully use it up on your electronic device before storing in a dry, cool place. Repeat this charging and using up once a year to maintain the battery pack's function. [. . . ] ⷠYou don't have to discharge the battery pack before recharging. Charging while some capacity remains does not affect the original battery capacity. [. . . ]