New Account | Dealer Login | Cart: 0 items

Alternate Views:

Compatible Laptop Battery Replaces lenovo 42T4751

Our Price:   
Price Unavailable



Technical Specs Compatibility Shipping Rates Tech Support    
42T4751 Specifications
 Our ValueOEM Value
Capacity 4400 mAh / 48 Wh
Cellcount 6 cell
Color Black
Manufacturer Premium PowerLenovo
Package height 8
Package length 8
Package width 8
Product weight 0.9 lbs
Shipping weight 1
Technology Li-IonLi-ion
UPC 842740027844
Volts 10.8 V
UPC 842740027844

Compatible Laptop Battery Replaces lenovo 42T4751

This new replacement laptop battery from eReplacements is 100% compatible with your lenovo thinkpadl420 78544Sx and is Black in color and is rated at 4400 mAh / 48 Wh and 10.8 V. eReplacements laptop batteries all come with a 1 year warranty and will meet or exceed the original lenovo thinkpadl420 78544Sx laptop battery specifications because they are manufactured for high performance in our ISO 9000 factories using the best quality cells and most up to date safety and engineering control standards:
  • High/low temperature shut off protection
  • Thermal runaway protection
  • Overcharge shut off protection
  • Over discharge shut off protection
  • Cell imbalance shut off protection
  • Fire resistant plastic casing
  • Manufactured using the most up to date TI BQ20Z chip set

Click here for a current SDS sheet on this Laptop Battery

Thousands of resellers, dealers and service companies over the years have trusted eReplacements to provide their customers with quality replacement laptop batteries.
Compatible Models
Lenovo ThinkPad E40Lenovo ThinkPad Edge 0578-47BLenovo ThinkPad Edge E520
Lenovo ThinkPad Edge 14 0578-7UJLenovo ThinkPad Edge 14 0578-7VJLenovo ThinkPad Edge 14 0578-7WJ
Lenovo ThinkPad Edge 14 0578-7XJLenovo ThinkPad Edge 14 0578-7YJLenovo ThinkPad Edge 15 301K7J
Lenovo ThinkPad Edge E420 1141-CTOLenovo ThinkPad Edge E420 1167-CTOLenovo ThinkPad Edge E420 1198-CTO
Lenovo ThinkPad Edge E420 E420Lenovo ThinkPad Edge E425 1141-CTOLenovo ThinkPad Edge E425 1167-CTO
Lenovo ThinkPad Edge E425 1198-CTOLenovo ThinkPad Edge E425 E425Lenovo ThinkPad Edge E425 E520
Lenovo ThinkPad Edge E425 E525Lenovo Thinkpad L410 2842-CTOLenovo Thinkpad L410 2847-CTO
Lenovo Thinkpad L410 2873-CTOLenovo Thinkpad L410 2874-CTOLenovo Thinkpad L410 2875-CTO
Lenovo Thinkpad L410 2931-CTOLenovo Thinkpad L410 L410Lenovo Thinkpad L412 L412
Lenovo Thinkpad L420 5015-36xLenovo Thinkpad L420 5015-37xLenovo Thinkpad L420 5015-3Dx
Lenovo Thinkpad L420 5015-3ExLenovo Thinkpad L420 5015-CTOLenovo Thinkpad L420 5016-4Fx
Lenovo Thinkpad L420 5016-4GxLenovo Thinkpad L420 5016-4HxLenovo Thinkpad L420 5016-4Jx
Lenovo Thinkpad L420 5016-5LxLenovo Thinkpad L420 5016-5MxLenovo Thinkpad L420 5016-65x
Lenovo Thinkpad L420 5016-66xLenovo Thinkpad L420 5016-67xLenovo Thinkpad L420 5016-CTO
Lenovo Thinkpad L420 5017-4PxLenovo Thinkpad L420 5017-4QxLenovo Thinkpad L420 5017-4Rx
Lenovo Thinkpad L420 5017-4SxLenovo Thinkpad L420 5017-4TxLenovo Thinkpad L420 5017-4Ux
Lenovo Thinkpad L420 5017-4VxLenovo Thinkpad L420 5017-4WxLenovo Thinkpad L420 5017-4Xx
Lenovo Thinkpad L420 5017-CTOLenovo Thinkpad L420 5019-CTOLenovo Thinkpad L420 7826-3Hx
Lenovo Thinkpad L420 7826-3JxLenovo Thinkpad L420 7826-3KxLenovo Thinkpad L420 7826-3Lx
Lenovo Thinkpad L420 7826-3MxLenovo Thinkpad L420 7826-3NxLenovo Thinkpad L420 7826-3Px
Lenovo Thinkpad L420 7826-3QxLenovo Thinkpad L420 7826-45xLenovo Thinkpad L420 7826-46x
Lenovo Thinkpad L420 7826-47xLenovo Thinkpad L420 7826-48xLenovo Thinkpad L420 7826-49x
Lenovo Thinkpad L420 7826-4AxLenovo Thinkpad L420 7826-4BxLenovo Thinkpad L420 7826-CTO
Lenovo Thinkpad L420 7827-4CxLenovo Thinkpad L420 7827-4DxLenovo Thinkpad L420 7827-4Ex
Lenovo Thinkpad L420 7827-5AxLenovo Thinkpad L420 7827-5BxLenovo Thinkpad L420 7827-CTO
Lenovo Thinkpad L420 7829-4ZxLenovo Thinkpad L420 7829-53xLenovo Thinkpad L420 7829-54x
Lenovo Thinkpad L420 7829-58xLenovo Thinkpad L420 7829-59xLenovo Thinkpad L420 7829-5Ax
Lenovo Thinkpad L420 7829-5BxLenovo Thinkpad L420 7829-5CxLenovo Thinkpad L420 7829-5Dx
Lenovo Thinkpad L420 7829-CTOLenovo Thinkpad L420 7853-CTOLenovo Thinkpad L420 7854-39x
Lenovo Thinkpad L420 7854-3AxLenovo Thinkpad L420 7854-3BxLenovo Thinkpad L420 7854-3Cx
Lenovo Thinkpad L420 7854-3DxLenovo Thinkpad L420 7854-3ExLenovo Thinkpad L420 7854-3Fx
Lenovo Thinkpad L420 7854-3GxLenovo Thinkpad L420 7854-3HxLenovo Thinkpad L420 7854-3Jx
Lenovo Thinkpad L420 7854-3KxLenovo Thinkpad L420 7854-3LxLenovo Thinkpad L420 7854-3Mx
Lenovo Thinkpad L420 7854-3NxLenovo Thinkpad L420 7854-3PxLenovo Thinkpad L420 7854-3Qx
Lenovo Thinkpad L420 7854-3XxLenovo Thinkpad L420 7854-3YxLenovo Thinkpad L420 7854-3Zx
Lenovo Thinkpad L420 7854-4GxLenovo Thinkpad L420 7854-4HxLenovo Thinkpad L420 7854-4Nx
Lenovo Thinkpad L420 7854-4PxLenovo Thinkpad L420 7854-4QxLenovo Thinkpad L420 7854-4Sx
Lenovo Thinkpad L420 7854-4TxLenovo Thinkpad L420 7854-CTOLenovo Thinkpad L420 7856-3Gx
Lenovo Thinkpad L420 7856-3HxLenovo Thinkpad L420 7856-3JxLenovo Thinkpad L420 7856-3Kx
Lenovo Thinkpad L420 7856-3LxLenovo Thinkpad L420 7856-3MxLenovo Thinkpad L420 7856-3Wx
Lenovo Thinkpad L420 7856-CTOLenovo Thinkpad L420 7859-3CxLenovo Thinkpad L420 7859-3Dx
Lenovo Thinkpad L420 7859-3ExLenovo Thinkpad L420 7859-3FxLenovo Thinkpad L420 7859-3Gx
Lenovo Thinkpad L420 7859-3HxLenovo Thinkpad L420 7859-3JxLenovo Thinkpad L420 7859-3Kx
Lenovo Thinkpad L420 7859-3LxLenovo Thinkpad L420 7859-3MxLenovo Thinkpad L420 7859-3Nx
Lenovo Thinkpad L420 7859-3PxLenovo Thinkpad L420 7859-3QxLenovo Thinkpad L420 7859-3Rx
Lenovo Thinkpad L420 7859-3SxLenovo Thinkpad L420 7859-3TxLenovo Thinkpad L420 7859-3Zx
Lenovo Thinkpad L420 7859-42xLenovo Thinkpad L420 7859-43xLenovo Thinkpad L420 7859-4Fx
Lenovo Thinkpad L420 7859-4GxLenovo Thinkpad L420 7859-4HxLenovo Thinkpad L420 7859-4Nx
Lenovo Thinkpad L420 7859-4PxLenovo Thinkpad L420 7859-4QxLenovo Thinkpad L420 7859-4Rx
Lenovo Thinkpad L420 7859-4SxLenovo Thinkpad L420 7859-4TxLenovo Thinkpad L420 7859-4Ux
Lenovo Thinkpad L420 7859-4VxLenovo Thinkpad L420 7859-5GxLenovo Thinkpad L420 7859-5Hx
Lenovo Thinkpad L420 7859-5KxLenovo Thinkpad L420 7859-5LxLenovo Thinkpad L420 7859-5Mx
Lenovo Thinkpad L420 7859-5NxLenovo Thinkpad L420 7859-5WxLenovo Thinkpad L420 7859-5Xx
Lenovo Thinkpad L420 7859-5YxLenovo Thinkpad L420 7859-5ZxLenovo Thinkpad L420 7859-63x
Lenovo Thinkpad L420 7859-64xLenovo Thinkpad L420 7859-65xLenovo Thinkpad L420 7859-66x
Lenovo Thinkpad L420 7859-67xLenovo Thinkpad L420 7859-6AxLenovo Thinkpad L420 7859-6Ex
Lenovo Thinkpad L420 7859-6FxLenovo Thinkpad L420 7859-6GxLenovo Thinkpad L420 7859-6Hx
Lenovo Thinkpad L420 7859-6JxLenovo Thinkpad L420 7859-CTOLenovo Thinkpad L420 7860-3Dx
Lenovo Thinkpad L420 7860-3HxLenovo Thinkpad L420 7860-3JxLenovo Thinkpad L420 7860-CTO
Lenovo ThinkPad L421 L421Lenovo Thinkpad L510 2842-CTOLenovo Thinkpad L510 2847-CTO
Lenovo Thinkpad L510 2873-CTOLenovo Thinkpad L510 2874-CTOLenovo Thinkpad L510 2875-CTO
Lenovo Thinkpad L510 2931-CTOLenovo Thinkpad L510 L510Lenovo ThinkPad L512 L512
Lenovo Thinkpad L520 5015-36xLenovo Thinkpad L520 5015-37xLenovo Thinkpad L520 5015-3Dx
Lenovo Thinkpad L520 5015-3ExLenovo Thinkpad L520 5015-CTOLenovo Thinkpad L520 5016-4Fx
Lenovo Thinkpad L520 5016-4GxLenovo Thinkpad L520 5016-4HxLenovo Thinkpad L520 5016-4Jx
Lenovo Thinkpad L520 5016-5LxLenovo Thinkpad L520 5016-5MxLenovo Thinkpad L520 5016-65x
Lenovo Thinkpad L520 5016-66xLenovo Thinkpad L520 5016-67xLenovo Thinkpad L520 5016-CTO
Lenovo Thinkpad L520 5017-4PxLenovo Thinkpad L520 5017-4QxLenovo Thinkpad L520 5017-4Rx
Lenovo Thinkpad L520 5017-4SxLenovo Thinkpad L520 5017-4TxLenovo Thinkpad L520 5017-4Ux
Lenovo Thinkpad L520 5017-4VxLenovo Thinkpad L520 5017-4WxLenovo Thinkpad L520 5017-4Xx
Lenovo Thinkpad L520 5017-CTOLenovo Thinkpad L520 5019-CTOLenovo Thinkpad L520 7287-4Cx
Lenovo Thinkpad L520 7287-4ExLenovo Thinkpad L520 78-295DxLenovo Thinkpad L520 7826-3Hx
Lenovo Thinkpad L520 7826-3JxLenovo Thinkpad L520 7826-3KxLenovo Thinkpad L520 7826-3Lx
Lenovo Thinkpad L520 7826-3MxLenovo Thinkpad L520 7826-3NxLenovo Thinkpad L520 7826-3Px
Lenovo Thinkpad L520 7826-3QxLenovo Thinkpad L520 7826-45xLenovo Thinkpad L520 7826-46x
Lenovo Thinkpad L520 7826-47xLenovo Thinkpad L520 7826-48xLenovo Thinkpad L520 7826-49x
Lenovo Thinkpad L520 7826-4AxLenovo Thinkpad L520 7826-4BxLenovo Thinkpad L520 7826-CTO
Lenovo Thinkpad L520 7827-4DxLenovo Thinkpad L520 7827-5AxLenovo Thinkpad L520 7827-5Bx
Lenovo Thinkpad L520 7827-CTOLenovo Thinkpad L520 7829-4ZxLenovo Thinkpad L520 7829-53x
Lenovo Thinkpad L520 7829-54xLenovo Thinkpad L520 7829-58xLenovo Thinkpad L520 7829-59x
Lenovo Thinkpad L520 7829-5AxLenovo Thinkpad L520 7829-5BxLenovo Thinkpad L520 7829-5Cx
Lenovo Thinkpad L520 7829-CTOLenovo Thinkpad L520 7853-CTOLenovo Thinkpad L520 7854-39x
Lenovo Thinkpad L520 7854-3AxLenovo Thinkpad L520 7854-3BxLenovo Thinkpad L520 7854-3Cx
Lenovo Thinkpad L520 7854-3DxLenovo Thinkpad L520 7854-3ExLenovo Thinkpad L520 7854-3Fx
Lenovo Thinkpad L520 7854-3GxLenovo Thinkpad L520 7854-3HxLenovo Thinkpad L520 7854-3Jx
Lenovo Thinkpad L520 7854-3KxLenovo Thinkpad L520 7854-3LxLenovo Thinkpad L520 7854-3Mx
Lenovo Thinkpad L520 7854-3NxLenovo Thinkpad L520 7854-3PxLenovo Thinkpad L520 7854-3Qx
Lenovo Thinkpad L520 7854-3XxLenovo Thinkpad L520 7854-3YxLenovo Thinkpad L520 7854-3Zx
Lenovo Thinkpad L520 7854-4GxLenovo Thinkpad L520 7854-4HxLenovo Thinkpad L520 7854-4Nx
Lenovo Thinkpad L520 7854-4PxLenovo Thinkpad L520 7854-4QxLenovo Thinkpad L520 7854-4Sx
Lenovo Thinkpad L520 7854-4TxLenovo Thinkpad L520 7854-CTOLenovo Thinkpad L520 7856-3Gx
Lenovo Thinkpad L520 7856-3HxLenovo Thinkpad L520 7856-3JxLenovo Thinkpad L520 7856-3Kx
Lenovo Thinkpad L520 7856-3LxLenovo Thinkpad L520 7856-3MxLenovo Thinkpad L520 7856-3Wx
Lenovo Thinkpad L520 7856-CTOLenovo Thinkpad L520 7859-3CxLenovo Thinkpad L520 7859-3Dx
Lenovo Thinkpad L520 7859-3ExLenovo Thinkpad L520 7859-3FxLenovo Thinkpad L520 7859-3Gx
Lenovo Thinkpad L520 7859-3HxLenovo Thinkpad L520 7859-3JxLenovo Thinkpad L520 7859-3Kx
Lenovo Thinkpad L520 7859-3LxLenovo Thinkpad L520 7859-3MxLenovo Thinkpad L520 7859-3Nx
Lenovo Thinkpad L520 7859-3PxLenovo Thinkpad L520 7859-3QxLenovo Thinkpad L520 7859-3Rx
Lenovo Thinkpad L520 7859-3SxLenovo Thinkpad L520 7859-3TxLenovo Thinkpad L520 7859-3Zx
Lenovo Thinkpad L520 7859-42xLenovo Thinkpad L520 7859-43xLenovo Thinkpad L520 7859-4Fx
Lenovo Thinkpad L520 7859-4GxLenovo Thinkpad L520 7859-4HxLenovo Thinkpad L520 7859-4Nx
Lenovo Thinkpad L520 7859-4PxLenovo Thinkpad L520 7859-4QxLenovo Thinkpad L520 7859-4Rx
Lenovo Thinkpad L520 7859-4SxLenovo Thinkpad L520 7859-4TxLenovo Thinkpad L520 7859-4Ux
Lenovo Thinkpad L520 7859-4VxLenovo Thinkpad L520 7859-5GxLenovo Thinkpad L520 7859-5Hx
Lenovo Thinkpad L520 7859-5KxLenovo Thinkpad L520 7859-5LxLenovo Thinkpad L520 7859-5Mx
Lenovo Thinkpad L520 7859-5NxLenovo Thinkpad L520 7859-5WxLenovo Thinkpad L520 7859-5Xx
Lenovo Thinkpad L520 7859-5YxLenovo Thinkpad L520 7859-5ZxLenovo Thinkpad L520 7859-63x
Lenovo Thinkpad L520 7859-64xLenovo Thinkpad L520 7859-65xLenovo Thinkpad L520 7859-66x
Lenovo Thinkpad L520 7859-67xLenovo Thinkpad L520 7859-6AxLenovo Thinkpad L520 7859-6Ex
Lenovo Thinkpad L520 7859-6FxLenovo Thinkpad L520 7859-6GxLenovo Thinkpad L520 7859-6Hx
Lenovo Thinkpad L520 7859-6JxLenovo Thinkpad L520 7859-CTOLenovo Thinkpad L520 7860-3Dx
Lenovo Thinkpad L520 7860-3HxLenovo Thinkpad L520 7860-3JxLenovo Thinkpad L520 7860-CTO
Lenovo Thinkpad L520 L520Lenovo ThinkPad SL410 2842Lenovo ThinkPad SL410 2842-CTO
Lenovo ThinkPad SL410 2847-CTOLenovo ThinkPad SL410 2873-CTOLenovo ThinkPad SL410 2874
Lenovo ThinkPad SL410 2874-CTOLenovo ThinkPad SL410 2875-CTOLenovo ThinkPad SL410 2931-CTO
Lenovo ThinkPad SL410 SL410Lenovo ThinkPad SL410k 2842Lenovo ThinkPad SL510 2842-CTO
Lenovo ThinkPad SL510 2847Lenovo ThinkPad SL510 2847-CTOLenovo ThinkPad SL510 2847-RE4
Lenovo ThinkPad SL510 2873-CTOLenovo ThinkPad SL510 2874-CTOLenovo ThinkPad SL510 2875
Lenovo ThinkPad SL510 2875-CTOLenovo ThinkPad SL510 2931-CTOLenovo ThinkPad SL510 SL510
Lenovo ThinkPad T410 T410Lenovo ThinkPad T410i T410iLenovo ThinkPad T420 T420
Lenovo ThinkPad T420i T420iLenovo ThinkPad T510 T510Lenovo ThinkPad T510i T510i
Lenovo ThinkPad T520 T520Lenovo ThinkPad T520i T520iLenovo ThinkPad W510 4389
Lenovo ThinkPad W510 W510Lenovo ThinkPad W520 W520

Compatible Part Numbers
Lenovo 42T4235Lenovo 42T4702Lenovo 42T4703
Lenovo 42T4731Lenovo 42T4733Lenovo 42T4737
Lenovo 42T4751Lenovo 42T4751-ERLenovo 42T4752
Lenovo 42T4753Lenovo 42T4755Lenovo 42T4756
Lenovo 42T4791Lenovo 42T4793Lenovo 42T4795
Lenovo 42T4796Lenovo 42T4797Lenovo 42T4817
Lenovo 42T4819Lenovo 51J0499Lenovo 57Y4185
Lenovo 57Y4185-ERLenovo 57Y4185-TM

eReplacements Shipping Rates


We offer several ways to ship your product. Orders over $500 ship free via FedEx Ground or Freight. Your exact shipping rate will be calculated in the cart and is determined by weight and zone but following is a guideline for approximate shipping rates:

  • USPS: $2.00 - $5.00 (under 1 lb); $7.00 (under 3 lbs)
  • FedEx Ground: $10.00 (under 15 lbs)
  • FedEx 2Day: $15.00 (under 10 lbs)
  • FedEx Standard Overnight (4:00 p.m.): $25.00 (under 10 lbs)
  • FedEx Priority Overnight (10:00 a.m.): $35.00 (under 10 lbs)

Items shipped via FedEx Ground will arrive to your city from our Dallas warehouse according to the time in transit map below: