From 98313ae94093db2c80594392a505e7e19b26ff18 Mon Sep 17 00:00:00 2001
From: Sebastian Kuzminsky <seb@highlab.com>
Date: Thu, 28 Aug 2025 16:32:02 -0600
Subject: [PATCH] power: add battery notes & another mppt charger

---
 hardware/power.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/hardware/power.md b/hardware/power.md
index 2c30331..2f891ab 100644
--- a/hardware/power.md
+++ b/hardware/power.md
@@ -2,6 +2,9 @@
 * lipo can charge at 1C
 * 5900mAh -> 5.9A
 
+Strawman design proposal: 1S LiPo, 18650 for easy ubiquitous availability
+(~3,000 mAh).  Add cells in parallel until you get the capacity you want.
+
 ## CHARGERS
 1. [5V 2A USB-C](https://www.amazon.com/DWEII-Converter-Step-Up-Charging-Protection/dp/B09YD5C9QC/)
 2. [5V 2A](https://www.amazon.com/Ruiwaer-Discharge-Integrated-Adjustable-Charging/dp/B08QHVW5J8)
@@ -14,3 +17,4 @@
 * mppt charge controllers:
 1. <https://www.amazon.com/Waveshare-Solar-Power-Manager-Regulated/dp/B0CT2ZBML9>
 2. <https://www.amazon.com/4-4-6-5V-Lithium-Battery-Charger-Controller/dp/B08DY28BXW>
+3. <https://www.amazon.com/Lithium-Battery-Charger-Charging-Converter/dp/B089NG9TFW>