Battery Fits Models:- thinkpad Edge E420s 440128u, edge E420s 4401, edge E420s 440129u, thinkpad Edge E420s 4401, thinkpad Edge E420s 440129u, edge E420s 14", edge E420s 440128u, thinkpad Edge E420s 14"

Battery Part Numbers:- 42t4928, 4icp9/52/61, 42t4975

Quality components are important for the efficient and smooth operation of your battery. We always use the best parts. As one of the worlds most successful third party battery manufacturers Cameron Sino have been certified and approved by multiple authorities. There products are all verified and tested for safety. Choosing the right product to fit and replace your battery can be difficult and for those of you who are not technically inclined it is very difficult. We do recommend that you remove the old battery before ordering or at least check with us to see if we can confirm fitment for you if at all possible. This really is the best thing to do. Many manufacturers have 2 or 3 different types of battery fitted in one model. Choosing the right product to fit and replace your battery can be difficult and for those of you who are not technically inclined it is very difficult. We do recommend that you remove the old battery before ordering or at least check with us to see if we can confirm fitment for you if at all possible. This really is the best thing to do. Many manufacturers have 2 or 3 different types of battery fitted in one model. Look at all of the details below and make sure that the model of your product and also the battery number are shown in the information below. The Cameron Sino range of batteries from Batterybuyer come with a one year warranty unless otherwise stated. The one year warranty that we offer covers any manufacturing defect. Please note that the warranty does not cover damages due to misuse of the battery nor diminishing run time due to normal wear and tear. Lithium Ion and Lithium polymer cells typically will last for between four hundred and five hundred cycles, Nimh cells have the ability to be charged for around five hundred cycles, cycle life will vary according to a number of different reasons. The actual life cycle of any of these batteries is not precise and failure can occur at differ times on like cells. Factors that influence their life include temperature, humidity and amount of charges. Batteries supplied by us from Cameron Sino are designed to be as durable as the original OEM battery in fact sometimes we actually surpass the original batteries with longer runtime higher capacity products. The ISO 9001 certification means that the battery uses high quality components, Each cells rating can be seen in the table above. Actual capacity and voltage may vary slightly from the original due to cell availability at the time of manufacture. Most of the known fitments for this product can be seen in the information below. Special Remarks:-While stocks lastIf you can confirm that all the details listed below match to your original battery before ordering this will avoid any costly wrong order returns. Please be aware that some models have more than one battery type available and the only way you can confirm the correct battery is to remove the original.If the capacity of the battery that we show is different to that of your original this does not mean that ours will not fit, it just means that our replacement battery will store slightly less or slightly more charge than the original.