For Power Function Train, which do you prefer type of battery power function?
Both have it own pro and con....
Not know the different in both battery? Here the Detail. If you already know the different then skip to vote box on the bottom of blog.
Power Functions Rechargeable Battery Box 8878
It rechaged by plug into the wall input. very convince way to recharge it up. But the question is how long dose the battery cycle life span last in long term? If it ran out of cycle charging out, you have to buy the new one for retail value USD $49.99. Very easy to leave the battery in the lego train and just put wire in the train while charge without need take them part to replace it.
Power Functions AAA Battery Box 88000
The most cheaper battery pack retail value USD $12.99 that require you to put in 6 AAA battery, value of it may be reasonable if you use rechargeable AAA battery instead of disposable battery. For long term, you can have that one pack for life time and easy replace the old aaa battery for cheaper. But depend on the train lego, some will require you more time to take lego apart to pull out the battery AAA battery, recharge it, put back in LEGO train to play with it.