Completely dead ..no light when charged..nothing

From your question it is understood that the speakers you were using was fully charged and it was working best for 1 hour completely and suddenly it has been stopped and seems to be totally dead. To help you, it is recommended to take the speaker charger and charge the speaker once again and after sometime check if the speaker turns ON working.
If issue persists, it is recommended to replace the speaker if it is in warranty or ask for repairing the speaker.
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Try using someone else's battery in your phone and/or your battery in their phone and try charging it and turning them on. If your phone turns on now, then its something wrong w/ the battery, if not... then its something wrong with your phone. Is there any possibility that it got wet? If so, take the battery out immediately (although its probably way too late after all the attempted charging), pour some rice into a small tupperware or other sealable container, snug your phone into the rice, then bury it completely in more rice and seal the container and LEAVE IT ALONE for at least a couple days. After u take it out and plug it in... go do something away from the phone for a bit... cuz it sometimes will take a while of looking like nothing is happening. I don't know what the notification light is like on that phone. But on mine, after probably 20 minutes of nothing while charging... the charging light started to flash (indicating that it is charging, but not yet ready to be turned on), once the light was solid on, turned the phone on no problem.

Hi, it seems that battery is totally discharged, that could be the reason of dead table. It should be good if you could check the connectors where the internal charger cable is connected, maybe one or both are damaged too.

Disconnect power supply completely and connect back and try charging battery for about 6 to 8 hours .

Remove battery, check if the phone works just with charger. If the battery is in 0, the phone doesn`t necessary understand it...

try taking battery out for 30 seconds,then put back in!?

May be the battery won't have charge, keep 1 or 2 hrs continues charges, and if it is not working then you have to replace the battery set full.

Always clean the battery terminals before jumping. An extremely dead battery may not accept a jump as it serves as a 'buffer" instead of helping. If you do get it started, charge battery with a battery charger then have alternator and battery tested for proper operation and check belt condition and tension as well.

Your battery may be completely dead and if that is the case then you will have to buy another one. You can't charge a completely dead battery.