Does the word “onboard” indicate a battery charger “on a boat or a ship”, or does it refer to a battery charger that is “on a circuit board inside a device that contains a battery”?
The list has been narrowed down by taking into account not only their performance but their battery life, efficiency, and even the manufacturer’s after-sales service, so you don’t have to research anymore.
Then this is the best time to begin looking for a replacement battery and fast. You don’t want to end up stranded in the middle of nowhere because of a dead battery.