ADT 4520638 Security Alarm System Battery 12v 33Ah
OSI Batteries is your One Source for replacement ADT Alarm System backup batteries. Vision 6FM33U1 is a Sealed Lead Acid that fits ADT 4520638 model security alarm systems.
We recommend checking your existing battery for size and specifications prior to ordering as manufacturers may change requirements without notice.
We recommend checking your existing battery for size and specifications prior to ordering as manufacturers may change requirements without notice.
| Chemistry: | Sealed Lead Acid |
| Nominal Voltage: | 12v |
| Nominal Capacity: | 33Ah |
| Dimensions (In.): | 7.68 x 5.12 x 6.10 |
| Terminals: | NB |
| Weight (lbs): | 22.5 |
| Warranty: | 12 months |
| Condition: | Brand New |
| Notes: | 10 Years Design Life |
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September 1, 2026 by Archie S. (CA, US)
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August 31, 2026 by James S. (NC, US)
“Easy to navigate”
August 31, 2026 by Steven H. (AZ, US)
“Very easy”
