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UPS with automatic voltage regulation?

Home battery backup systems?

UPS vs power bank differences?

How long do backups last?

3.7V/750mAH Replacement Battery for Sony NW-S710, NWZ-S600, NWZ-S600F, NWZ-S610, NWZ-S615, NWZ-S615F, NWZ-S616, NWZ-S616F, NWZ-S618, NWZ-S618FBLK, NWZ-S716FRNC, NWZ-S716FSNC, NWZ-S738, NWZ-S738FBNC

$14^.99

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G4S MP3 Player for Kids, Android 14, Wi-Fi, Spotify, 32GB, Black | 4-inch IPS screen, up to 40-hour battery, parental controls, Google Play Store, Audible, Bluetooth and TF card up to 1TB.

$105^.99

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Volume Discounts:$102.99 - $105.99

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32GB MP3 Player with 90 Hours Long Battery Life,Bluetooth 5.0, Z6 Digital Audio Player with Sturdy and Durable Metal Frame, 2.4'' IPS Glass Screen,FM Radio,Support up to 256GB

$61^.49

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altec lansing hydramini wireless bluetooth speaker, ip67 waterproof usb c rechargeable battery with 6 hours playtime, compact, shockproof, snowproof, everything proof (black)

$20^.88

More options from $18.88 - $20.88

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64GB Clip MP3 Player with Bluetooth 5.3: 15 Hrs Battery Mini Music Player, Earphones Included, 1000+ Songs Storage, No Phone Needed, Portable MP3 Players for Kids, Sports, Reading, Learning, Meetings

$51^.99

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96GB MP3 Player with 90 Hours Long Battery Life,Bluetooth 5.0,Phinistec Z6 Digital Audio Player with Sturdy and Durable Metal Frame, 2.4'' IPS Glass Screen,FM Radio,Support up to 256GB (Black, 96, GB)

$86^.99

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64GB MP3 Player with Bluetooth 5.3 Auto Reconnect, Zinc Alloy Body | Built-in Speaker & White Noise, 2.4" Screen, 45H Battery, Voice Recorder, FM Radio, Resume Playback, Up to 128GB microSD Card

$72^.99

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64GB MP3 Player with Bluetooth 5.3, Speaker & Physical Buttons | Portable Music Player with FM Radio, Voice Recorder, Lanyard & Earphones, Only 1.2 oz, 40H Battery, Up to 128GB microSD Card

$67^.99

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Hi-Res Portable MP3 Player, M0 Pro Bluetooth Music Player, Support USB Type-C 3.5mm Jack, 1.54" HD Touch Screen, 8-Hour Long Lasting Battery, Compact Digital Audio Player, Red

$398^.85

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32GB MP3 Player with Bluetooth 5.3 Auto Reconnect, Zinc Alloy Frame | Built-in Speaker & White Noise, 2.8" Touchscreen, 48H Battery, Resume Playback, Supports 128GB microSD Card, Metallic Purple

$67^.99

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Volume Discounts:$64.99 - $67.99

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64GB MP3 Player with Bluetooth 5.3, Speaker & Physical Buttons | Portable Music Player with FM Radio, Voice Recorder, Lanyard & Earphones, Only 1.2 oz, 40H Battery, Up to 128GB microSD Card

$66^.99

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Volume Discounts:$63.99 - $66.99

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32GB MP3 Player with Bluetooth 5.3 & Speaker, Physical Buttons | Portable Music Player with FM Radio, Voice Recorder, Lanyard & Earphones, Only 1.2 oz, 40H Battery, Up to 128GB microSD Card

$62^.99

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Volume Discounts:$59.99 - $62.99

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96GB MP3 Player with 90 Hours Long Battery Life,Bluetooth 5.0,Z6 Digital Audio Player with Sturdy and Durable Metal Frame, 2.4'' IPS Glass Screen,FM Radio,Support up to 256GB (Black, 96, GB)

$84^.99

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Volume Discounts:$81.99 - $84.99

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Clip-On Bluetooth MP3 Player 16GB Mini Sports Music Player with Clip, Bluetooth 5.0, 1.44" Screen, 20Hr Battery, Supports FLAC/APE/WAV, FM Radio, Voice Recorder, TF Card up to 128GB

$93^.01

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Top Up Reader 8g of a Long Battery Battery Sound Reader for Practical ABS (Spanish 1909 2018 New, )

$49^.41

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Volume Discounts:$47.81 - $49.41

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Top Up Reader 8g of a Long Battery Battery Sound Reader for Practical ABS (KJV, Indian English Accent English, 138 )

$49^.22

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Volume Discounts:$47.62 - $49.22

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Top Up Reader 8g of a Long Battery Battery Sound Reader for Practical ABS (Italian, KJV Music, Hebrew, 267 )

$47^.64

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Volume Discounts:$46.04 - $47.64

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Duo Underwater MP3 Player, Bone Conduction, 7-Hour Battery Listen to Music While You Swim with Clear Bone Conduction Audio from the Duo Underwater MP3 Player

$90^.74

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Top Up Reader 8g of a Long Battery Battery Sound Reader for Practical ABS (Korean, World English KJV, )

$49^.27

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Volume Discounts:$47.67 - $49.27

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ODEJOI 64GB Cute Penguin MP3 Player for Kids with Bluetooth 5.3 & Speaker | Volume Limit, 2" Screen, 65H Battery Life, FM Radio, Voice Recorder, Headphones, Lanyard, Supports 128GB microSD Card

$73^.17

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TIMMKOO 4'' Portable MP3 Player for Kids No Ads No Distractions BT & WiFi | Touch Screen Music Player with BT & WiFi, Loud Speaker, Pre-install Music, Audiobook and eBook Apps, 35H Battery, Up to 1TB

$95^.44

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AGXOV MP3 Player with Bluetooth Black with 760mAh Lithium Polymer Battery,Music Player

$143^.17

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SWOFY D08 MP3 Player with Bluetooth and WiFiMP4 Player with 2000mAh Lithium-Polymer Battery Blue

$127^.26

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HiFi MP3 Player with Hi-Res Lossless Audio, Bluetooth 5.3 Portable Music Player, 64GB Memory, 3.5mm Balanced Output, Long Battery Life for High-End Headphones, UP to 256GB

$145^.99

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HiFi MP3 Player with Hi-Res Lossless Audio, Bluetooth 5.3 Portable Music Player, 64GB Memory, 3.5mm Balanced Output, Long Battery Life for High-End Headphones,UP to 256GB

$145^.99

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64GB MP3/MP4 Player for Students Bluetooth Music Player with Speaker, FM Radio, Voice Recorder, E-Book Reader, Photo Viewer, TF Card Expandable, 18Hr Battery, Black

$99^.58

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MP3 PLAYER, WATERPROOF, SPORTS, 8GB Memory, IPX8 Rating, USB Connection, Rechargeable Battery, Includes Earbuds, Perfect for Swimming, Running, Gym, Ergonomic Design, Sweatproof, Dustproof

$119^.99

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64GB HiFi Lossless Music Player DSD256 Master-Quality Audio, 25Hr Battery, 2000mAh, Supports FLAC/APE/WAV, TF Card Expandable, Portable MP3 for Sports/Car/Travel

$150^.05

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MP3 Player with 720P Camera, Multiple Formats, FM Radio, E Books, Alarm Clock, Stopwatch, Recording - Up to 128GB Expansion, 500mAh Battery (with 32G Memory Card)

$59^.76

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Volume Discounts:$58.16 - $59.76

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D08 32GB MP3 Player with Bluetooth and WiFi with 2000mAh Lithium-Polymer Battery,Music Player Black

$119^.99

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16GB MP3 Player with Bluetooth and WiFi with 2000mAh Lithium-Polymer Battery

$104^.99

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80GB MP3 Player with Bluetooth and WiFi with 2000mAh Lithium-Polymer Battery,Music Player Blue

$119^.99

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C5 HiFi Lossless Music Player 8GB MP3/MP4 Digital Audio Player with Bluetooth, Zinc Alloy Body, 1.8" TFT Screen, Supports FLAC/APE/WAV, 50Hr Battery, TF Card up to 128GB

$112^.35

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G4S MP3 Player for Kids, Android 14, Wi-Fi, Spotify, 32GB, Black 4-inch IPS screen, up to 40-hour battery, parental controls, Google Play Store, Audible, Bluetooth and TF card up to 1TB

$98^.99

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64GB MP3 Player with Bluetooth 5.3, Zinc Alloy Body, Built-in Speaker | 2.4" Screen, Touch Buttons, 45H Battery, HiFi Sound, FM Radio, Voice Recorder, Resume Playback, Supports 128GB microSD Card

$77^.94

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Portable handheld battery spot welding machine for 18650 lithium batteries, welding of nickel sheets and nickel strips, aluminum oxide copper welding tip

$73^.99

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Volume Discounts:$73.59 - $73.99

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