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Efest K4 Slim - 4 Bay Charger

Unit price  per 
Please Note: UK plug is NOT included with this charger and can be purchased here.

Slim, 4-bay charger for externally charging your compatible batteries.


The Efest Slim K4 Quad Bay Battery Charger is a high quality, cost efficient, portable charger capable of charging 4 cells at any one time. Featuring Micro USB allowing for 1 amp charging (1 amp x 2). Each battery bay is monitored independently to provide an efficient charge of each battery. There is an LED indicator to show the current charge level of each battery. In build into each charger is a range of protections to promote safer battery charging. Included protections are reverse polarity detection, overcharge protection, short circuit protection, amongst others. A great charger for everyday use and perfect for those trips away in thanks to its small size and quality design.

  • Input: AC 100~240V 50/60Hz
  • Compatible With: 10440, 14500, 14650, 16340, 16650, 17650, 17670, 18350, 18490, 18500, 18650, 20700, 26500, 26650
  • Auto Cutoff Voltage: 4.20V ± 0.05V
  • Auto Recharge Voltage 4.10V ± 0.10V
  • Operation Temperature: 0°C ~ 40°C

Package Contents:

  • K4 Charger
  • USB Cable Type-C
Fast delivery £3.99 for all orders or free if you spend over £40.

Order by 2pm Mon-Fri for same-day dispatch.

All orders are dispatched by Royal Mail 24 service. You will receive a tracking link but please note it is not a fully tracked service. You can check on delivery status and re-arrange re-delivery etc through the link. Most orders arrive the next working day but you should expect in 1-3 business days. Order by 2pm Mon-Fri for same day dispatch.
Efest K4 Slim - 4 Bay Charger