When you're comparing memory-batteries-power kits for Nikon cameras, the first question isn't charger size or listed price-it's which battery your camera actually uses. One Kastar kit is built around the EN-EL3e / MH-18a battery line and the Nikon D90 DSLR camera. The other is built around the EN-EL10 battery line and the Nikon Coolpix S3000 and S4000 cameras. Once that's clear, the choice is mostly about charging style and listed price.
Quick verdict
If your camera matches the EN-EL3e / MH-18a pairing with the D90, the wall charger kit gives you a traditional AC wall charger with a foldable flat pin. If your camera matches the EN-EL10 pairing with the Coolpix S3000/S4000, the slim charger kit gives you a slim USB charger instead.
At a glance
The two kits are $2.60 apart at their listed prices.
| EN-EL3e wall charger kit | EN-EL10 slim charger kit | |
|---|---|---|
| Listed price | $6.99 | $9.59 |
| Battery | 2650mAh, 7.4V Li-Ion | 1400mAh, 3.7V Li-Ion |
| Charger | AC input 100-240V, DC output 8.4V 600mA, foldable flat pin | USB input 5V 1A-2A, DC output 4.2V 600mA, micro USB cable included |
| Compatibility named in title | EN-EL3e / MH-18a / Nikon D90 DSLR | EN-EL10 / Nikon Coolpix S3000 / S4000 |
Both are Kastar kits that include a charger, a Li-Ion replacement battery, and red/green charging LEDs.
Where each kit fits
- The EN-EL3e wall charger kit is the fit when you want a traditional AC wall charger for the EN-EL3e / MH-18a pairing named with the D90.
- The EN-EL10 slim charger kit is the fit when you want a slim USB charger for the Coolpix S3000/S4000 pairing named in the title, with a micro USB input and a bundled micro USB cable.
Product notes
Kastar EN-EL3e Wall Charger for Nikon D90
This kit pairs a wall charger with a Kastar replacement battery. The charger accepts AC input from 100 to 240V and outputs DC 8.4V 600mA, which lines up with the 7.4V 2650mAh Li-Ion battery in the package. A foldable flat pin makes the charger easy to store, and the LED shows red while charging and green when it is on standby or fully charged. The practical catch is the charging path: the description specifies that a car adapter and European plug are not included, so this kit is centered on wall-outlet charging. If your camera matches the EN-EL3e/MH-18a/D90 pairing, this is the simpler AC option.
Kastar EN-EL10 Slim Charger for Nikon Coolpix S3000/S4000
This kit takes the USB route. The charger uses a micro USB input rated at 5V 1A to 2A and outputs 4.2V 600mA, which matches the 3.7V 1400mAh Li-Ion battery in the box. A micro USB cable is included, so the setup is ready for any 5V USB power source you already have. The LED turns red while charging and green when standby or full. The trade-off is that the listed capacity is 1400mAh and the charger's 4.2V output is specific to the EN-EL10 pairing named with the Coolpix S3000/S4000, so matching it to that battery family matters before you buy.
Final choice by use case
At a $2.60 listed-price difference, compatibility naming and charging style matter more than the price gap. Choose the EN-EL3e wall charger kit if you want AC wall charging for the EN-EL3e/MH-18a/D90 pairing; choose the EN-EL10 slim charger kit if you prefer a slim USB charger for the EN-EL10/Coolpix S3000/S4000 pairing.
