Picture shows aaa too short for charger to reach contact points. Does it work?

Be sure to read the enclosed instructions for the charger regarding proper insertion of both size batteries. As already noted, different contact points and different insertion techniques. If you are forcing AAA's in place (and ruining the charger contacts) or they fall out you are doing something wrong.

Waterpik toothbrush has battery 3.7V, can I replaced with these battery?

No, this is a different type of battery, different voltage. It would not work.

How long it takes to charge 2 aa with an advanced charger?

TL;DR: 2.5-3 hours I'm not entirely sure what an "advanced charger" is but my charger outputs 3V@1550mA to two AA batteries. At this rate the batteries should take roughly 2.5 to 3 hours to charge. Your charger is likely not very different so I would expect the same. I'd recommend having enough so that you always have batteries to swap with because that is extremely convenient.

What about use in Europe, will an adapter work? Can it withstand the higher voltage used there? Thanks!

The answer by jennicalaura is incorrect. The charger is 100V-240V Auto Voltage. It's printed right on the package (see left side of the picture). So yes, it will work in Europe with the appropriate adapter and without using a transformer.

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K-KJ17M3A4BA Advanced Individual Cell Battery Charger Pack with 4 AAA eneloop 2100 Cycle Rechargeable Batteries

Product ID: 16865928

Details

Brand
Panasonic
Color
gray
Item Weight
0.35 Pounds
Output Voltage
1.2 Volts (DC)
Product Dimensions
1.25"D x x

⚡Individually charges 4 cells

🔋2100 recharge cycles max

☀️Pre-charged via solar power

206.32 DT

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Description

🔋 Power your life sustainably with Panasonic’s smartest charger pack!

READY WHEN YOU ARE - Pre-charged with eco-friendly solar energy and holds 70% charge for 10 years.
UNMATCHED LONGEVITY - Recharge up to 2100 times—save money and reduce waste.
SMART LED INDICATORS - Four separate LEDs keep you informed on each battery’s status at a glance.
COMPACT TRAVEL READY - Lightweight design with retractable plug—power up anywhere, anytime.
PRECISION INDIVIDUAL CHARGING - Each battery gets a perfect, tailored charge for peak performance.

The Panasonic K-KJ17M3A4BA pack includes a CC17 charger and four AAA eneloop NiMH rechargeable batteries capable of up to 2100 recharge cycles. Pre-charged using solar energy, these batteries maintain 70% charge over 10 years and feature advanced individual cell charging with LED indicators. Compact and efficient, this set is ideal for professionals seeking reliable, eco-conscious power solutions.

Specifications

ASIN	B010U57MSW
Best Sellers Rank	#123,952 in Health & Household ( See Top 100 in Health & Household ) #194 in AAA Batteries #309 in AA Batteries
Brand	Panasonic
Built-In Media	4 AA eneloop rechargeable batteries, CC17 rechargeable battery charger
Color	gray
Compatible Devices	Solar
Customer Reviews	4.6 4.6 out of 5 stars (2,269)
Global Trade Identification Number	00073096902404
Input Voltage	120 Volts
Item Dimensions D x W x H	1.25"D x 2.63"W x 4.3"H
Item Weight	0.35 Pounds
Manufacturer	Panasonic
Mfr Part Number	K-KJ17M3A4BA
Model Number	K-KJ17M3A4BA
Number of Ports	4
Output Voltage	1.2 Volts (DC)
UPC	073096902404
Unit Count	1.0 Count
Warranty Description	This product is guaranteed to be free from defects in materials and workmanship

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206.32 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Tunisia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Farhan Q.

The delivery time was excellent, and the packaging was secure.

2 months ago

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