Differences-Between-H1-and-H2-models.md

+Portapack H1 hardware represents the original design, which is well documented, placed in the public domain. 
+
+Portapack H2 hardware is a custom modification of the original design, made by unknown fans (which at this time are keeping their design notes / documents for themselves) including some upgrades:
+
+* Bigger screen
+* Different navigation buttons
+* internal battery
+* battery charging circuitry
+* better internal Speaker integration
+
+Note: _There is also an hybrid H1 / H2 model, called the 2020 H1 Model, which is an H1 but with a bigger screen._
+
 # Audio
 
 At a glance, hardware-side, both models feature a **headphone connector** and the same **AK4951 AUDIO / CODEC IC** (You can get the datasheet [following this link](https://www.akm.com/content/dam/documents/products/audio/audio-codec/ak4951aen/ak4951aen-en-datasheet.pdf)).
@@ -16,9 +28,16 @@ The **AK4951 IC** is rotated 180º and placed more into the middle of the circui
 
 The speaker audio header is switched on/off by the headphone female connector, which includes the usual switch, detecting the insertion of a male plug in it. 
 
+
 ## Audio in H1 model
 
 Only the soldering pads for an internal speaker connector header are present. The speaker +/GND signals on the pad are routed directly into AK4951 pins.
 
 **NOTE:** _There is no extra amplifier IC between the speaker pad and the AK4951. The AK4951 includes a speaker amplifier capable of 1W, when powered @5v._
 
+You can solder a laptop / tablet speaker in H1 speaker pads. In order to enable it, you will need to install MAYHEM firmware, where you can also configure under **OPTIONS -> INTERFACE** the addition of a SPEAKER button on your top status bar.
+
+### Audio devil is in the Details
+Since the firmware is shared between H1 and H2, on Portapack H2 you end up powering up TWO speaker amplifiers: The one inside AK4951 IC, and the extra CS8122S one.
+
+