There’s a long-known issue with the LEGO® Education Spike Essential® batteries that if they are left alone for long enough the hub will stop charging them. You will get a blinking orange light on the hub (instead of solid red indicating charging) and the battery will not be charged.
This is especially annoying as many users find the batteries dead out-of-the-box, meaning that a freshly purchased and just unboxed set cannot be put to use. LEGO used to replace the batteries (and pretend it’s not a widespread problem), but the issue can hit you anytime you leave your battery in the hub for prolonged amount of time and sending the dead battery in isn’t always a viable option (especially if you need it for classes next day).
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