One of the most common questions about a personalized screen greeting card is battery life. Will the video play when the recipient opens the card three months after mailing? Rophone engineers cards for reliable playback from day one through years of standby. Here is exactly how the power system works.
Every card uses a built-in rechargeable lithium polymer battery. Capacity ranges from 120mAh for 2.4 inch models to 500mAh for 7 inch models. The battery is thin—just 3mm—and sealed inside the card spine. It passes CE, RoHS and UN38.3 certification for air freight. A full charge plays video for 45-90 minutes depending on screen size and brightness.
Actual playback depends on screen size and video length. A 4.3 inch card plays 60-90 minutes on a full charge. A 7 inch card plays 45-60 minutes. Most greeting videos are 30-120 seconds, so a single charge plays your video 40-80 times. Recipients can replay the video by pressing the side button or opening the card again.
Cards charge via a micro USB port on the spine. A full charge takes 1.5-2 hours. The battery has no memory effect, so partial charging is fine. Rophone ships a 15cm micro USB cable with every bulk order. We recommend instructing recipients to charge the card if the video plays dim.
Standby time is where engineering matters. When the card is closed, the circuit enters sleep mode drawing under 0.01mA. Our cards hold a charge for 12-18 months in standby. This means you can mail cards in January and recipients can open them in June for a wedding and the video still plays. See the full electronic greeting card range for battery options.
Cards support three playback modes. Play-once plays the video when opened and stops when closed. Loop-replay repeats the video continuously until closed. Button-trigger plays only when the side button is pressed. Rophone defaults to play-once for greeting cards and loop-replay for trade show display cards. You choose the mode per order.
Rophone tests every card battery before packing. Each card plays for 10 seconds on our QC line before shipping. Visit our personalized screen greeting card page to request a free sample and test the battery yourself.