SONY Walkman NW-A45 Disassembly and battery replacement
1 Remove the cover on the main unit.
2 Remove the cover under the main body.
There are two 3 screws, so remove them.
4 Remove the cover on the back of the main unit.
5 There are 4 screws, so remove them.
6 Peel off the black cellophane above the battery wiring.
7 Remove one screw.
8 Flip the battery cover.
9 Remove the battery
According to the disassembled photo of the previous model NW-A40 series, the
capacity of the installed battery seems to be 500mAh. The NW-A50 series will have the same battery capacity. The battery capacity of smartphones at this time is 3000mAh class, but if it is 500mAh, it is expected that the battery life will drop suddenly if the current consumption increases a little.
According to the help guide, the NW-A50 series has "Bluetooth (transmission mode) MP3 (128 kbps) / SBC connection priority about 20 hours, FLAC (96 kHz / 24 bit) / LDAC connection priority (automatic) about 13 hours, content format. Battery life can be shortened by up to 45% depending on the settings of and connected devices. "," When "Equalizer" or "DSEE HX" of "Various sound quality settings" is enabled, all are "Off". By comparison, battery life is about 70% shorter. Depending on the situation, the battery life will be reduced to 7.15 hours with FLAC (96 kHz / 24 bit) / LDAC when connected via Bluetooth, and up to 9 hours with FLAC (96 kHz / 24 bit) when connected via wire. ..
https://www.sony.jp/support/walkman/guide/nw-a50s/contents/TP0001825742.html
Turn off the power when not in use as a way to extend battery life, set [Auto power off setting], set [Screen off timer] to a short time, adjust the screen brightness to dark, sound quality function It introduces turning off all settings, turning off when not using the Bluetooth function, turning off when not using the NFC function, etc., and if you stack these little by little, you will get closer to the expected battery life. Things will be possible.
https://www.sony.jp/support/walkman/guide/nw-a50s/contents/TP0001691174.html
Lithium-ion batteries typically reach 80% of their original performance after 300-500 charges and discharges, and then rapidly deteriorate and become unusable after a certain limit.
If you charge it every day, it will take one to one and a half years, but if you charge it once a week, it will take about five to ten years.
If you limit the charging to about 80-90%, you can expect that the number of times will be doubled or more.
The temperature of the battery also has a great effect, so if it is exposed to a high temperature environment such as putting it in a case or using it in a hot place, the battery will be extremely damaged by itself.
In fact, in most environments, the time to noticeable battery deterioration will be well below the theoretical number of charges.
That said, players are unlikely to be charged every day.
Power supply
Built-in lithium-ion rechargeable battery
USB power supply (supplied from a computer by connecting the included USB cable)
Like old IC Recorders which didn’t have internal batteries, USB alone is enough to power an old Walkman? New IC Rec and new Walkman can do USB alone? – it does use USB but it’ll charge too! New IC Rec – can’t take batt out. But PCM-D10 is OK because you can!
*Note that battery will be charged unless the device uses more electricity than can allow charging? (e.g. HS Power control still charges if CPU isn’t used enough).
Do not sleep with headphones on. Headphone cord while sleeping
It can get tangled in the neck and cause suffocation.
Do not start, restart, wake up from sleep mode, or exit the computer while the Walkman is connected via USB.
When the "Careful charging" function of this unit is set to "On", charging stops when the battery charge reaches about 90%.
Battery care mode is the function that reduces deterioration of the battery by not charging the battery fully or a 100 % of full charge. When this function is activated, charging stops at about 90 % of the full charge.