Honeywell Ademco 300-03866 Battery 7.2v 3800mAh NiMH
This 7.2v 3800mAh rechargeable NiMH battery is an aftermarket replacement for Honeywell Ademco 300-03866.
| Application: | Alarm System, Burglar Alarm, Security System |
| Device Manufacturer: | Honeywell Ademco |
| OEM Part: | 300-03866 |
| Nominal Voltage: | 7.2v |
| Nominal Capacity: | 3800mAh |
| Chemistry: | Rechargeable NiMH |
| Dimensions (In.): | 4.3 x 2.7 x .7 |
| Weight (pounds): | 0.6 |
| Notes: | 4/3A Size cells, 3 Pin Plug |
| Condition: | Brand New |
| Warranty: | 1 yr from date of shipment |
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.
December 3, 2025 by CAP (WA, US)
“Detailed description of battery specifications and dimensions.”
December 2, 2025 by Mike V. (NC, US)
“It was great, super easy to use website”
December 2, 2025 by Joel L. (PA, US)
“ordered this item 3 time before and will order it again”
