Disclosure up front. We make PicDock (on Google Play: “Photo Slideshow, Digital Frame”, by DD_studio), an Android photo frame app, so we are not neutral. To keep this useful anyway, every statement about batteries and screens below links to the manufacturer's own support page as we read it on October 20, 2026. Where we could not find an official source, we say it is our advice. Everything about PicDock comes from our public facts page.
A tablet on a shelf is a frame you can pick up. A tablet on the wall is closer to an appliance: it is plugged in all the time, nobody touches it for months, and it shows images from morning to night. That changes three things compared with keeping a tablet on a table: the battery never leaves the charger, the cable has to go somewhere, and the screen does the same job every day. This page is about those three.
1. Power: a battery that never leaves the charger
Lithium-ion batteries do not like sitting at 100% for months, and the major manufacturers have built features for exactly this case. What their pages say:
- Samsung Galaxy tablets. Samsung's page on Battery protection in One UI 6.1 says: “Keeping your battery at a full 100% charge for a long time can reduce its lifespan.” The Maximum option stops charging at 80%; Basic charges to 100% and waits until 95% before charging again; on versions below One UI 6.1 the only option is to limit charging to 85%. Samsung US confirms that this applies to a “phone or tablet” in its “not charging past 80% or 85%” article. For a frame on the wall, the 80% option is the one to pick. Our Galaxy Tab frame guide has the other Samsung settings.
- Google Pixel Tablet. Google's Battery protection on your Pixel Tablet page says that on the Charging Speaker Dock the tablet pauses charging at 90%, and that it “automatically limits charging to about 70-80%” when it “charges continuously for more than several days” or for more than a few hours at high temperature. You do not have to switch anything on for the second part.
- iPad. Apple's Maximizing battery performance page is the clearest on heat: avoid ambient temperatures higher than 35 °C (95 °F), “which can permanently damage battery capacity”, and “software may limit charging above 80% when the recommended battery temperatures are exceeded.” It also says that charging inside certain cases “may generate excess heat”.
- Other brands. Look in Settings > Battery for “protect battery”, “charge limit” or “optimized charging”. If your tablet has none, we do not know of an app that can add a hardware charge limit, and PicDock does not.
Our advice on top of that, not taken from a manufacturer page:
- Heat is what you control. Do not mount the tablet above a radiator, a stove, or in a spot that gets afternoon sun through a window. A wall that feels warm in summer is a bad wall.
- Use the charger that came with the tablet, or one from the same maker, rather than the cheapest adapter in the drawer. The tablet only needs to keep up with a lit screen, not to fast-charge.
- Look at it once in a while. If the case starts to bulge, the screen lifts at an edge, or it gets hot to the touch, unplug it, stop using it and contact the manufacturer. Do not keep it on the wall “until it dies”.
2. Mounting: our advice, not a manufacturer's
We found no tablet maker's support page about putting a tablet on a wall, so this section is our advice from what has worked for us and our users.
- Choose a mount you can take the tablet out of. You will want to update it, reset it, or replace it one day. Clamp-style holders, magnetic plates and simple ledges are easier to live with than a frame you have to unscrew.
- Leave the back open to air. A fully enclosed box looks tidy and traps heat — see Apple's note about cases above. A few millimetres of gap behind the tablet is enough.
- Plan the cable before you drill. The charging port decides whether the tablet hangs in portrait or landscape and which side the cable leaves from. Use a right-angle USB-C (or Lightning) cable so the plug does not stick out of the frame.
- Run the cable along the wall, not through it. A paintable surface-mounted cable channel down to an existing socket is the low-risk way. Fix the mount into the wall properly for its weight (anchors or a stud), not with double-sided tape alone above a hard floor.
- Keep the buttons reachable. If a power cut drains the battery, someone will need to press the power button.
Electrical work is for an electrician. A new socket behind the tablet, a USB outlet in the wall, running any power cord inside a wall cavity, or hard-wiring a power supply are all electrical installation work. What is allowed depends on where you live, so ask a licensed electrician rather than following a video — including any video of ours.
3. The screen: burn-in on a frame that is always on
Burn-in is an OLED issue. Apple's page about OLED displays on iPhone describes it this way: “image persistence” is temporary and “disappears after a few minutes of normal use”, while “burn-in can occur in more extreme cases such as when the same high-contrast image is continuously displayed at high brightness for prolonged periods of time.” Samsung's OLED monitor page defines burn-in as a static image that “becomes a permanent fixture on your screen”. Many tablets use LCD panels instead; check your model's spec sheet for OLED or AMOLED before worrying.
For a photo frame, the photos themselves are the easy part, because they change every few seconds or minutes. The risk is in what stays still. Our advice:
- Keep static overlays small. A clock and weather in one corner, all day, every day, is the part of a frame that most resembles the “same high-contrast image” Apple describes. If you have an OLED tablet, consider a smaller clock or none.
- Lower the brightness. A wall frame rarely needs full brightness; Apple's description of burn-in names high brightness, and a dimmer screen also runs cooler.
- Turn the screen off at night. Nobody looks at a hallway frame at 3 a.m. Real screen-off time is the one setting that cuts both burn-in exposure and heat.
We wrote a longer piece on OLED burn-in and always-on displays (it is about a phone clock, but the mechanism is the same).
What PicDock does on a wall
From the facts page, on Android:
- Auto-start when the charger is connected or on boot. After a power cut, the frame comes back by itself instead of sitting on a home screen.
- Keep-screen-on, so you do not have to change the system screen timeout.
- Night mode with scheduled dimming and a sleep schedule that can turn the screen off — the burn-in and heat advice above, on a timer.
- Several clock styles and weather that you can switch off, and a battery indicator.
- Photos from the device, Google Photos (picker), Dropbox, OneDrive, iCloud Shared Albums and NAS/SMB, with cloud and NAS sources re-read automatically, so new photos appear without anyone touching the tablet on the wall.
What PicDock does not do
- It cannot set a charge limit or change any battery setting. Use your tablet's own Battery settings, as above.
- No Google Drive support.
- No playback of videos stored in the cloud. Dropbox, OneDrive and Google Photos show photos only; videos play from the device and, as an optional beta, from a NAS.
- The Android screensaver shows device photos only. Cloud and NAS sources play in the app's full-screen slideshow.
- Cloud and NAS sources are Android only. PicDock for iPhone and iPad is a separate app (iOS 15 or later) that uses the device's photo library only, with its own features and prices.
What it costs
The Google Play version is free to download and use: all photo sources except web upload are free, and Premium is optional, as a lifetime purchase (US$19.99 in the US), a yearly or a monthly subscription; your country's price is shown in the app. New installs get a 7-day trial of all features. The Amazon Appstore version for Fire tablets is a paid app (US$4.99). Details on the facts page.
FAQ
Is it safe to leave a tablet plugged in 24/7 as a wall photo frame?
Manufacturers build for it but recommend limiting how long the battery sits at 100%. Samsung's Battery protection can stop charging at 80% (85% on versions below One UI 6.1). Google says the Pixel Tablet limits charging to about 70-80% after charging continuously for several days. Apple warns that ambient temperatures above 35 °C can permanently damage battery capacity. Turn on your tablet's battery protection, keep it out of direct sun and heat, and if the case ever bulges, unplug it and stop using it.
Will a photo frame burn in an OLED tablet screen?
A changing slideshow is the gentle case. Apple describes burn-in as occurring in more extreme cases, when the same high-contrast image is continuously displayed at high brightness for prolonged periods. The parts that stay still in a frame are overlays such as a clock or weather. Lower brightness, turn the screen off at night, and keep static overlays small. Most LCD tablets are not affected in the same way; check whether your model has an OLED or AMOLED screen.
How do I get power to a wall-mounted tablet?
The simple way is a long USB cable along the surface of the wall in a paintable cable channel, down to an existing socket. Anything inside the wall, a new outlet behind the tablet, or hard-wired power is electrical work: ask a licensed electrician, because what is allowed depends on your local rules.
Does PicDock start by itself after a power cut?
On Android, PicDock can start the slideshow automatically when the charger is connected or when the tablet boots, and it keeps the screen on while it runs. It also has scheduled night dimming and a sleep schedule that can turn the screen off. It cannot change the tablet's own battery settings; those stay in Android's settings.
In short
On the wall, the software is the easy part. Turn on your tablet's battery protection, keep it away from heat and sun, choose a mount you can open and a cable you can see, leave anything inside the wall to an electrician, and give an OLED screen dim light, a small clock and real nights off. Related: keeping a tablet on as a frame · Samsung Galaxy Tab as a frame · OLED burn-in and always-on screens.