Panasonic Eneloop K-KJ87MCA4BA Charger with 4 AA Batteries
- Up to 2100 recharges per eneloop AA cell
- 2000 mAh typical, 1900 mAh minimum per AA cell
- About 3 hours to charge 4 fully discharged AA cells
- 4 charging stations, each with its own LED
- 4 AA cells included, pre-charged at the factory
- 70% of charge retained after 10 years when not in use
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A complete kit for anyone starting out with rechargeable AA cells, charger included. Charge time is given for AA cells only, so planning around AAA use means guessing.
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ASIN: B07WTRGRCVModel: K-KJ87MCA4BACategory: Battery Chargers
Overview
A household drawer of spare batteries is where a kit like this belongs: four AA rechargeable cells and a charger with one bay for each. Every bay charges its cell on its own and has its own LED, so charge state is read cell by cell.
The pairing is the reason to buy: cells that arrive pre-charged and a charger that treats each one separately, so mixed charge levels do not matter. The limit is scope. The listing names AA and AAA cells only, says nothing about other sizes, and gives a charge time for AA cells alone.
Who it's for
A home retiring single-use AA cells in everyday gear gets the whole system in one box. Buyers who need other cell sizes, or a charger that runs from a car or USB source, should look elsewhere because neither is described.
Pros and cons
- Four AA cells included in the box
- Each bay charges independently
- Separate LED for every bay
- Cells arrive pre-charged
- Charge time given for AA cells only
- Input and output ratings not listed
- Only one set of cells supplied
- Power source for the charger unstated
Performance notes
Charging happens bay by bay, so each cell is handled separately and a part-full cell is not held back by a deeper-drained neighbor. The LED beside every bay shows where that cell stands, which lets you pull finished cells early. Capacity is quoted as a typical and a minimum figure, so real runtime falls between the two and depends on what the device draws.
Specifications
| Brand | Eneloop |
|---|---|
| Model | K-KJ87MCA4BA |
| Dimensions & fit | |
| Battery sizes | AA and AAA |
| Capacity & performance | |
| Battery Capacity | 2000 mAh typical, 1900 mAh minimum |
| Power & efficiency | |
| Battery Charge Time | About 3 hours for 4 fully discharged AA cells |
| Battery chemistry | Ni-MH |
| Construction & materials | |
| Color | White |
| Included components | |
| Included Components | Charger and 4 eneloop AA cells |
| Other details | |
| Number Of Batteries | 4 AA |
| Charge retention (batteries) | Up to 70% after 10 years |
| Reusability | Up to 2100 times |
| Charging stations | 4, each charged individually |
| Charge indicators | 4 separate LEDs, one per station |
Closest rivals on specs
BONAI MY-C006 AA AAA Battery Charger 16 Bay- Battery Charge Time 3 vs 3.5 hours (-14%)
Amazon Basics Smart AA AAA Battery Charger 4-Bay- Battery Charge Time 3 vs 3.5 hours (-14%)
Amazon Basics AA AAA Battery Charger with USB Port- Battery Charge Time 3 vs 4 hours (-25%)
Frequently asked questions
Is the Eneloop K-KJ87MCA4BA a USB or car charger?
The listing describes a battery charger with individual charging stations for AA and AAA cells. It gives no USB or vehicle charging details, so treat it as a standalone charger for those two cell sizes.
Can the Eneloop charger be used with other battery brands?
The listing says the charger individually charges each eneloop AA and AAA rechargeable battery. It says nothing about other brands, so check the cell type before loading anything else.
How long do the included Eneloop AA cells take to charge?
The charger fills 4 fully discharged AA cells in approximately 3 hours. A time for AAA cells is not given.
Do the Eneloop batteries arrive charged?
Yes. The AA cells are pre-charged at the factory and keep up to 70% of their charge after 10 years when not in use.