How do "C" Spacers and "D" Spacers work? Can it charge them? are they included or is it just a spot to put them once you buy "C" or "D" batteries.

The spacers use 1 AA battery and it can be used in generally any device that requires C or D batteries. The major drawback is that while the devices run the same 1.5 voltage per battery the lack of mAh or capacity is apparent with using an AA as a D battery. I prefer looking for a 2AA spacer like this - http://www.amazon.com/gp/product/B00EL0RPLM/which doubles the mAh capacity on a single battery. Depending on what device you use them on it could be useful or a headache as either you'll need to remove the battery to recharge them as they die or get more spacers and AA batteries. I have used the 2AA spacers with some regular Eneloops and they lasted the rated time stated on my 2D LED Maglite, but instead of dimming out a little the flashlight had nearly depleted the batteries. Still, they worked for a reasonable amount of time and at the most i would only need to carry an extra set of spacers with some Eneloops to easily swap them out.Some people got 5-6 hours on their toys or baby rockers with these spacers which imo wasn't bad, they would just have to do the same or to get the 2AA spacers which would double the run time. I wonder why Panasonic doesn't have 2AA spacers instead or at the very least offer the real C or D rechargeable batteries, which is an expensive alternative but well worth it since there are plenty of devices that require D batteries.

Is this a smart charger? I'm afraid of overcharging, wondering if I should go with a Lacrosse Alpha charger, I just don't trust their batteries...

I put my available batteries into the charger 24/7 and now is about one month. Everything works well, so I think it is "smart". Also, you can see the green light at the bottom when they are being charged. When they are full charged, the green light goes off. Usually it wont charge too long.

Does anyone find a compatible EU adapter for the BQ-CC17 charger?

This is a "multivoltage" charger that accepts a power input anywhere from 100VAC to 240VAC, at both 50Hz and 60 Hz, so it will work anywhere in the world, and you don't need a power "converter", just a plug adapter that accepts the standard US plug and has the correct pins for any specific country on the other side/end. They're quite common and inexpensive (and available on Amazon, among many other places.) They're often sold in sets to fit multiple countries' outlets, but there is of course no single adapter for all EU countries, since many of them have their own "style" of electrical outlet.

Can this charger also recharge eneloop PRO AA batteries?

After looking at the Pro High Capacity batteries and chargers, my guess is No. This one says capacity is only 2000 mAH, so your Pro batteries would only be charged part of the way, not the full 2550 mAH capacity they have.

ASIN	B00JHKSLSW
Batteries	10 AA batteries required.
Best Sellers Rank	#85,651 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #744 in Cordless Tool Battery Packs
Customer Reviews	4.7 4.7 out of 5 stars (2,450)
Date First Available	April 18, 2014
Department	Electronics
Is Discontinued By Manufacturer	No
Item Weight	1.51 pounds
Item model number	K-KJ17MCC82A
Manufacturer	Panasonic
Product Dimensions	1.68 x 8.63 x 7.63 inches

Panasonic KJ17MCC82A eneloop Power Pack, 8AA, 2AAA, 2 C Adapters, 2 D Adapters, Advanced Individual Battery Charger and Plastic Storage Case

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