Why are some duracell rechargeable batteries black and some green?

I think the black are older. I recently ordered green and got black. They do not hold their charge and I discovered after 30 days. Amazon would not take back. I will not buy rechargeable batteries from them in future.

The ion speed 1000 charger is listed with 4 aa and 2 aaa. the photo and product description seem to suggest it comes with 6 aa and 2 aaa. which is it?

There are 4 shorter slots for the AAA batteries + 4 longer slots for the longer AA batteries. You have to put multiples of 2 of the batteries in to have it charge - so 2 or 4 of the AA - same w/ the AAA (2 or 4).

If I have 1 dead battery (0%) and 1 low battery (25%) and put both in the charger at the same time, will it only make 1 fully charged, or both?

Both will be fully charged you can put one dead and one fully charged on the same circuit and the one that's dead will charge and the other one will stay charged

My wife’s vibrator runs on 16AA cells. Energizers AA’s Peter out after 7-8hrs continuous use. Will these do better?

Yes better batteries different brands

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🔋 Stay charged, stay ahead — power your life with Duracell Ion Speed 1000!

SMART SAFE - Automatic shut-off and LED indicators keep you informed and worry-free.
READY WHEN YOU ARE - Pre-charged batteries hold power for up to 1 year, so you’re always prepared.
POWER UP IN A FLASH - Charge 4-6 AA/AAA batteries simultaneously with 4000mW of pure speed.
ECO SAVVY RECHARGEABLES - Duracell NiMH batteries last up to 400 recharge cycles—save money and the planet.
TRUSTED DURACELL QUALITY - #1 battery brand trusted for everything from daily devices to emergency essentials.

The Duracell Ion Speed 1000 charger delivers rapid 4-8 hour charging for AA and AAA NiMH batteries, supporting up to 6 batteries at once with 4000mW power. Included are high-capacity rechargeable batteries (1300mAh to 2500mAh) that can be recharged up to 400 times and hold charge for up to a year. Featuring automatic shut-off and LED status indicators, this trusted Duracell system combines speed, safety, and sustainability for household and business use.

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