From 002693b95f72b3447f0dd4094a5b44b09ddaa584 Mon Sep 17 00:00:00 2001
From: Skip Hansen <shansen@gfrn.org>
Date: Sun, 27 Apr 2025 11:47:55 -0700
Subject: [PATCH] =?UTF-8?q?Updated=202.9=E2=80=B3=20Chroma=2029=20(markdow?=
 =?UTF-8?q?n)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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---
 2.9″-Chroma-29.md | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/2.9″-Chroma-29.md b/2.9″-Chroma-29.md
index 5bace5e..4d488cc 100644
--- a/2.9″-Chroma-29.md
+++ b/2.9″-Chroma-29.md
@@ -50,8 +50,13 @@ the following table.
 | Y|JA0xxxxxxxB<br>or<br>JA1xxxxxxxB | [edk286 Issue 9](https://github.com/OpenEPaperLink/OpenEPaperLink/assets/4642629/b9cb9b99-83b6-418b-bb90-938cca3a55b2)<br>220-0067-09<br>2015| similar to UC8154 | [WF0290T1PBZ01](https://github.com/OpenEPaperLink/OpenEPaperLink/assets/4642629/757efd5f-58a8-4e63-9203-8971989b2726)|1. EPD pin 4&5 (VGL,VGH) are n/c<br>2. Q2 & Q3 added for nEnable|
 | N | JFxxxxxxxxB | [edk286 Issue 12](https://github.com/jjwbruijn/OpenEPaperLink/assets/4642629/7ffb3ac0-856f-4fcb-bce5-9fe58fc8e1ea)<br>220-0067-12<br>2015| ? | [WF0290T1DBZ010E42](https://github.com/jjwbruijn/OpenEPaperLink/assets/4642629/d05beb5e-3ad6-4102-ab54-370bd405b9ad)<br>[cable](https://github.com/jjwbruijn/OpenEPaperLink/assets/4642629/39d32401-1df3-4b57-bef5-32f39535ad41) | Note: Some Issue 9 tags also start with JF<br>these **may be** BWY rather than BWR models. |
 | Y| JA1xxxxxxxC | [edk296 Issue 1](https://user-images.githubusercontent.com/1102694/112720670-0b763400-8f00-11eb-93ba-e635734bff6d.jpg)<br>220-0094-01<br>2018 |similar to UC8151C |WFD0290BF33| Rev supported by Dmitry's original firmware |
-| Not yet<br>Port started|MExxxxxxxxC | [edk505 Issue4](https://github.com/jjwbruijn/OpenEPaperLink/assets/4642629/9e215e18-6269-4eb7-b318-d2aa57d2d5fe)<br>220-0095-004<br>2019| ? | DEPG0290RWU51011HPB1E|Processor is a CC1310<br> FCC ID: VC7120-0200 |
+| Not yet,<br>a port has<br>been started|MExxxxxxxxC | [edk505 Issue4](https://github.com/jjwbruijn/OpenEPaperLink/assets/4642629/9e215e18-6269-4eb7-b318-d2aa57d2d5fe)<br>220-0095-004<br>2019| ? | DEPG0290RWU51011HPB1E|Processor is a CC1310<br> FCC ID: VC7120-0200 |
 
+## Battery Current
+
+The expected battery current while the tag is sleeping between updates is about 1.2 microamps for a JA0xxxxxxxB tag and about 1.7 microamps for a JA0xxxxxxxB tag.
+
+The JA0xxxxxxxB version includes a FET that disconnects the power to the EPD while it isn't being accessed.  The JA0xxxxxxxB version does not have this FET which is why the idle current is a little higher.
 # General Chroma 29 Info
 
 Known EPD controllers are either similar to the [UC8151](https://www.orientdisplay.com/wp-content/uploads/2022/09/UC8151C.pdf) or the [UC8154](https://v4.cecdn.yun300.cn/100001_1909185148/UC8154.pdf) depending on version.