Battery Cap | Expansion for BTN-1 Macro Deck

The Battery Cap for the Apollo BTN-1 Macro Deck is an add-on module that prepares your control panel for wireless, battery-powered operation . This module replaces the standard back cover and provides a PH 2.0 battery connector , allowing you to connect an external battery pack. Note: The battery is NOT included and must be purchased separately. Perfect for users who want to use their BTN-1 wirelessly.

Battery requirements and specifications

The Battery Cap is designed for batteries with the following specifications:

• Connector type : PH 2.0 (2-pin)
• Maximum dimensions : 80mm x 30mm x 8mm (not larger)
• Recommended specifications : 3.7V lithium-ion, 2800 mAh
• Battery life (estimated) : Up to 1 year at ~4 button presses per day with 2800mAh battery
• Requirements : Use only batteries with built-in protection circuit (BMS)

Battery not included - you must purchase a suitable 3.7V lithium-ion battery that meets the specifications above. Batteries with a PH 2.0 connector are available online from electronics suppliers.

Standby behavior when using battery

When using a battery (via this Battery Cap), the BTN-1 automatically activates intelligent sleep functionality to save battery:

• The BTN-1 automatically goes into sleep mode when inactive
• Wake-up time : About 10 seconds after first button press
• First press wakes the device - second interaction registers the action
• Multi-button functionality (double/triple press) only works when device is awake
• For instant-response applications: use USB-C power instead of battery

This drag functionality is ideal for occasional operation such as everyday scene activation, but less suitable for applications that require immediate response (such as live streaming or gaming macros).

Onboard battery charging

When you connect a rechargeable battery via the Battery Cap, it charges via the BTN-1's USB-C port . You can continue using the device while it's charging. The battery status is visible in real time in Home Assistant via ESPHome , so you know exactly when charging is needed.

Features and Benefits

• Enables battery operation : Adds PH 2.0 connector to BTN-1
• Replaces standard back : Easy plug and play installation
• Battery Space : Designed for batteries up to 80mm x 30mm x 8mm
• Onboard USB-C charging : Charges connected battery via BTN-1 USB-C port
• Battery monitoring : Real-time status in Home Assistant via ESPHome (with battery connected)
• Intelligent sleep mode : Automatic power saving when battery is used
• Tool-free installation : No tools required for assembly
• Stand Compatible : Works with BTN-1 Stand accessory
• Durable housing : Protects battery and electronics

Please note : This Battery Cap does not include a battery - you will need to purchase a suitable 3.7V lithium-ion battery with a PH 2.0 connector that fits within the maximum dimensions (80mm x 30mm x 8mm).

Ideal applications with Battery Cap (with battery connected)

Perfect for :

• Mobile demonstrations : Show your smart home setup without cables
• Seasonal check : Place decoration without power outlet
• Temporary events : No wiring required for short-term installations
• Flexible placement : Test different locations without USB limitations
• Backup power : Continuous operation during power failure
• Daily Scene Activation : Morning/Evening Routines with a Single Press
• Emergency control : Activate alarm without power dependency

Less suitable for :

• Live streaming controls : 10 seconds wake-up time too long
• Gaming macros : Instant response required
• Frequent multi-button actions : Double/triple press only works when device is awake
• Real-time monitoring : Continuous-active applications consume battery quickly

Technical specifications

• Type : Add-on battery module (battery not included)
• Function : Replaces standard back cover, adds battery support
• Connector : PH 2.0 (2-pin) for external battery
• Maximum battery dimensions : 80mm x 30mm x 8mm
• Recommended battery : 3.7V lithium-ion, 2800 mAh with BMS
• Charging method : Onboard via USB-C port of BTN-1 (with battery connected)
• Charging while in use : Yes, fully functional while charging
• Battery monitoring : Real-time via Home Assistant ESPHome (with battery connected)
• Sleep mode : Automatically activated when battery is used
• Wake-up time : ~10 seconds after sleep mode (when using battery)
• Installation : Tool-free, replaces standard back panel
• Compatibility : Exclusively for BTN-1 Macro Deck
• Material : Durable plastic

Where to buy battery

Suitable batteries with a PH 2.0 connector are available from various online suppliers.

• Search terms : "3.7V lithium battery PH 2.0 connector 2800mAh" or "LiPo battery PH2.0"

Always check :

• Dimensions: Maximum 80mm x 30mm x 8mm
• Voltage: 3.7V (single cell lithium-ion or LiPo)
• Connector: PH 2.0 (2-pin) with correct polarity
• BMS: Battery must have built-in protection circuit
• Capacity: 2800mAh recommended for long battery life

Frequently Asked Questions

Does the Battery Cap come with a battery?

No , the Battery Cap doesn't come with a battery . It's an add-on module that prepares the BTN-1 for battery operation. You'll need to purchase a suitable 3.7V lithium-ion battery with a PH 2.0 connector.

Which battery should I buy?

A 3.7V lithium-ion battery with a PH 2.0 connector , maximum dimensions 80mm x 30mm x 8mm , recommended capacity 2800 mAh . Use only batteries with a built-in BMS (protection circuit).

Why does it take 10 seconds for the BTN-1 to respond with battery?

The BTN-1 enters intelligent sleep mode to extend battery life up to 1 year. The first button press wakes the device , and the second interaction executes the action. For instant response, use USB-C power.

Do double and triple press functions work with battery?

Yes, but only if the device is already awake . The first press wakes the device, after which all multi-press functions work normally until it goes back to sleep.

How long does a 2800mAh battery last?

With normal use (~4 button presses per day), a 2800mAh battery lasts up to 1 year thanks to the intelligent sleep functionality.

How do I charge the battery?

Connect a USB-C cable to the BTN-1, and the connected battery will automatically charge via the onboard charging circuit. No external charger required.

Can I use the device while charging?

Yes, the BTN-1 remains fully functional while charging via USB-C. There is no wake-up delay when using wired power.

Is battery status shown in Home Assistant?

Yes, when a battery is connected, the battery level is reported in real time to Home Assistant via ESPHome. You can create automations for low-battery notifications.

Does the Battery Cap fit with the BTN-1 Stand?

Yes, the Battery Cap is designed to be perfectly compatible with all BTN-1 accessories including the Stand.

Which type of battery: LiPo or Li-ion?

Both are suitable as long as they are 3.7V (single cell), have a PH 2.0 connector , and fit within the 80mm x 30mm x 8mm dimensions . LiPo batteries are more compact but more sensitive; Li-ion batteries are safer. Always choose batteries with a BMS.

✅ slimhuisje.nl – Battery Cap add-on for wireless BTN-1 operation! Battery sold separately.