In a sense, yes. The battery is likely instead of cleanly and linearly going down in voltage is possibly falling down steep, skipping the voltages the SP is calibrated to run the red LED rather than green. For example, full cell is at 4.2v and dead is at 3v (these may not be fully accurate for the SP). If the SP was set to trigger warning St 3
Faulty Alternator. If the alternator is not working correctly, it may cause the battery light to flicker on and off. This could be due to a malfunctioning alternator, belt tension problems, or other issues. Alternator problems often cause other electrical problems, such as dim or flickering headlights. The classic sign of a failing alternator 24K subscribers in the GameboyAdvance community. Business, Economics, and Finance. GameStop Moderna Pfizer Johnson & Johnson AstraZeneca Walgreens Best Buy Novavax SpaceX Tesla GBA SP battery light flickers between red and green. It does this if Iā€™m holding the unit with the slightest bit of pressure. I put a brand new battery in from Retro Modding and the issue still persists. Iā€™ve tried cleaning the power switch slider with alcohol as well. Any guesses?

Findings. Not only does the IPS display draw more current at each voltage at its maximum brightness, itā€™s on a factor of multiplesā€¦ at full battery (3.0V) the IPS display is drawing 3x the stock current, and then is more than 3x as the batteries depleteā€¦ shutting down when the batteries hit 2.2V. The AGS-101 mod fares better, but we must

The Game Boy Advance SP features a flip-top screen measuring 40.8 x 61.2mm (exactly the same size as the Game Boy Advance) with a resolution of 240x160 pixels, over 32,000 displayable colours, an integral screen light and a rechargeable lithium-ion battery as used in mobile telephones.

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gba sp battery light flickering