Exhibit 12.1
RATIO OF EARNINGS TO FIXED CHARGES
EnerSys
Computation of Ratio of Earnings to Fixed Charges
The following table sets forth the ratio of earnings to fixed charges of the Company for the five fiscal years ended March 31, 2017:

|  | Fiscal year ended March 31,
|  | 2017 |  | 2016 |  | 2015 |  | 2014 |  | 2013
|  | (dollars in thousands)
Earnings: |  |  |  |  |  |  |  |  |  |
Income before provision for income taxes |  | $ | 212,695 |  |  | $ | 181,937 |  |  | $ | 249,339 |  |  | $ | 163,747 |  |  | $ | 230,233 |
Plus: fixed charges |  | 35,011 |  | 35,399 |  | 33,624 |  | 29,792 |  | 29,977
Total |  | $ | 247,706 |  |  | $ | 217,336 |  |  | $ | 282,963 |  |  | $ | 193,539 |  |  | $ | 260,210 |
Fixed charges: |  |  |  |  |  |  |  |  |  |
Interest expense including capitalized interest |  | $ | 23,014 |  |  | $ | 23,869 |  |  | $ | 21,633 |  |  | $ | 18,151 |  |  | $ | 18,947 |
Interest within rental expense |  | 11,997 |  | 11,530 |  | 11,991 |  | 11,641 |  | 11,030
Total |  | $ | 35,011 |  |  | $ | 35,399 |  |  | $ | 33,624 |  |  | $ | 29,792 |  |  | $ | 29,977 |
Ratio of earnings to fixed charges |  | 7.08 |  | 6.14 |  | 8.42 |  | 6.50 |  | 8.68

NOTE: These ratios include EnerSys and its consolidated subsidiaries. The ratio of earnings to fixed charges was computed by dividing earnings by fixed charges for the periods indicated, where “earnings” consist of (1) earnings from operations before income taxes plus (2) fixed charges, and “fixed charges” consist of (a) interest, whether expensed or capitalized, on all indebtedness, including non-cash interest accreted on Convertible Notes of $1,330, $8,283, $7,614, $7,001 and $6,436, respectively, for fiscal 2016 through fiscal 2013, (b) amortization of premiums, discounts and capitalized expenses related to indebtedness, and (c) portion of operating lease rental expense considered to be representative of the interest factor. Interest related to uncertain tax positions is included in the tax provision in the Company’s Consolidated Statements of Income and is excluded from the computation of fixed charges.