Emerson UPS400 UPS System Battery
OSI Batteries is your One Source for Emerson UPS System replacement batteries. CP645 is a high quality aftermarket battery that fits Emerson UPS400 model uninterruptible power supply systems.
Emerson UPS400 Requires 1 battery per unit please add to cart accordingly.
We recommend checking your existing battery for size and specifications prior to ordering as manufacturers may change requirements without notice. The original batteries in many UPS Systems are tied together with wire harnesses and/or fuses; we recommend that you save these in order to reuse them with your replacement batteries.
Emerson UPS400 Requires 1 battery per unit please add to cart accordingly.
We recommend checking your existing battery for size and specifications prior to ordering as manufacturers may change requirements without notice. The original batteries in many UPS Systems are tied together with wire harnesses and/or fuses; we recommend that you save these in order to reuse them with your replacement batteries.
| Chemistry: | Sealed Lead Acid |
| Nominal Voltage: | 6v |
| Nominal Capacity: | 4.5Ah |
| Terminals: | .187" |
| Dimensions (L x W x H): | 2.76 x 1.85 x 3.98 |
| Weight (pounds): | 1.87 |
Reviews
We're currently collecting product reviews for this item. In the meantime, here are some reviews from our past customers sharing their overall shopping experience.
4.7
Out of 5.0
Overall Rating
96%
of customers that buyfrom this merchant give
them a 4 or 5-Star rating.
March 7, 2026 by Bradley C. (IL, US)
“Ordering was straightforward. I hope the rest of the transaction is as easy.”
March 6, 2026 by Dan T. (WA, US)
“Have used OSI in the past with great results.”
March 4, 2026 by Paul H. (NH, US)
“They had exactly what we needed. No one else seemed to have the specialty batteries.”
