Schlage Electronics 24885600, AD400/402 Battery Replacement Kit

About this item

The Schlage 24885600 is the official battery replacement kit for AD400 and AD402 networked wireless access control locks. If your Schlage smart lock is flashing a low battery warning and you've been relying on a proprietary battery pack, this is the part that ends that problem for good. It converts your lock to standard off-the-shelf AA batteries, so when the Schlage door lock battery runs low, anyone on your facilities team can handle the swap with cells from any hardware store, no special order required.

What's in the Kit

Everything needed for the full conversion ships in the box: an eight-battery holder, battery strap, holder screws, battery cover, and cover screw. Eight AA batteries are included to get you through the first replacement cycle immediately after installation. This is the complete kit, not just the holder.

Compatible Lock Series

The 24885600 is the correct Schlage battery pack replacement for the AD400 and AD402 networked wireless lock families. That covers cylindrical, mortise, and multi-technology reader configurations across the full AD-series platform, including keypad, proximity card, and smart card credential options. This part is not compatible with CO-series, ND-series, or residential Schlage Encode or Connect smart locks. Those use entirely different battery systems.

Why the Eight-Battery Configuration Matters

The AD400 in an eight-battery setup runs substantially longer between service calls than a four-battery configuration. More importantly, Schlage keyless entry locks report low battery status back to the access control panel before the lock hits a critical voltage threshold. That means facility managers see the warning in the system and schedule a swap proactively, rather than responding to a lock failure. Replacing the Schlage locks battery at the low-battery alert keeps the lock operating normally. Ignoring it until critical voltage causes the lock to hold its last known safe state and requires a mechanical key override, which is exactly what this kit prevents.

Who This Is For

Facilities managers, building engineers, access control integrators, and locksmiths managing AD400 or AD402 installations. This is a maintenance part. If you're ordering a new AD-series lock, battery holder configuration is specified at the time of the original order. If you have existing AD400 locks in service and need to replace depleted packs, convert to standard AA cells, or upgrade a four-battery holder to an eight-battery setup for longer service intervals, the 24885600 is the correct part number.

Why AA Matters in the Field

Proprietary battery packs create two real problems for facilities teams: availability and cost. When a Schlage keyless entry battery runs critical on a Friday at 5pm, a pack that requires a distributor order is a problem. Standard AA alkaline batteries available at any supply house or office supply store solve it immediately. This is why Schlage offers this conversion kit and why facilities teams running large AD400 fleets keep several on the shelf.