MCU powering with batteries

1. Battery types

- Alkaline cells

- 20% wasted

- NiCd cells

- LDO regulator required

- 20% energy wasted

* NiMH cells

* LiPo 18650 cells

- Many different packages and sizes

* LiFePO4

2. Lithium batteries

3.2V LFP Battery

1. Motivation: direct powering of MCU's

- ESP8266: 2.58-3.60V

- ESP32: 2.3-3.6V

2. MCU powering

2. Ref

[1] Microchip, AN: Battery power applications design guide

[401200; 40*1200

- 15Ah, 17Ah; W9221

https://www.alibaba.com/product-detail/3000-Cycle-GEB-Lifepo4-Battery-Cells_60561678927.html?spm=a2700.details.0.0.23bb33d2R3PWcZ

[381200; 38*1200

- 10Ah; W1230

https://www.alibaba.com/product-detail/solar-storage-battery-cell-38120-3_60514149984.html?spm=a2700.details.0.0.622944aapSiRvj

- 10Ah; W14507

https://www.alibaba.com/product-detail/38120-LiFePO4-Lithium-Iron-Phosphate-Rechargeable_60491712407.html?spm=a2700.details.0.0.388a44aavkqEuL

[331400; 33*140mm

- 15.5Ah; W4242

https://www.alibaba.com/product-detail/Cylindrical-33140-32135-15-5ah-lifepo4_1600124203292.html?spm=a2700.galleryofferlist.normal_offer.d_image.410e5c20VG7cAP

[32700

- 6000mAh; W615

https://www.alibaba.com/product-detail/3-2v-Lifepo4-5000mah-6000mah-Battery_1600370769657.html?spm=a2700.galleryofferlist.normal_offer.d_image.1cd344f0kXrzF0

- 6000mAh; W1783

https://www.alibaba.com/product-detail/3C-discharge-32700-lifepo4-6000mah-rechargeable_1600186821528.html?spm=a2700.details.0.0.20f5676dJbd4SE

- 6000mAh; W2459

https://www.alibaba.com/product-detail/custom-OEM-3-2v-32700-6000mah_1600379278754.html?spm=a2700.details.0.0.1db75310BeWjW8

- 6000mAh; W3074

https://www.alibaba.com/product-detail/Lifepo4-Cylindrical-Lifepo4-32650-3-2v_1600347954489.html?spm=a2700.galleryofferlist.normal_offer.d_image.410e5c20VG7cAP&s=p

[32650

- 6000mAh; 2089원

https://www.alibaba.com/product-detail/Hot-sale-LED-light-battery-32650_1600211691163.html?spm=a2700.details.0.0.3c4d6d93XIu67Z

- 6000mAh; W2459

https://www.alibaba.com/product-detail/Cheap-Price-Cylindrical-Best-3-2V_1600379732532.html?spm=a2700.galleryofferlist.normal_offer.d_image.410e5c20VG7cAP&s=p

- 6000mAh; W3443

https://www.alibaba.com/product-detail/Lifepo4-Cylindrical-Lifepo4-32650-3-2v_1600385213260.html?spm=a2700.galleryofferlist.normal_offer.d_image.410e5c20VG7cAP&s=p

- 5800mAh; W1476

https://www.alibaba.com/product-detail/lifepo4-32650-lithium-cell-5600mah-5800mah_1600304787659.html?spm=a2700.details.0.0.20f5676dJbd4SE

5500mAh; 1422

https://www.alibaba.com/product-detail/Lifepo4-Hot-Sale-Rechargeable-IFR-32650_1600119548635.html?spm=a2700.galleryofferlist.normal_offer.d_title.1fb26f1eFbfGak&s=p

- 5000mAh; W2029

https://www.alibaba.com/product-detail/32650-lifepo4-cheap-price-battery-cell_62517038510.html?spm=a2700.galleryofferlist.topad_classic.d_image.410e5c20VG7cAP

- 5000mAh; 1476

https://www.alibaba.com/product-detail/3-2v-Lifepo4-Battery-3-2v_62211134862.html?spm=a2700.galleryofferlist.normal_offer.d_image.1cd344f0kXrzF0&s=p

[26700

4000mAh; W1328

https://www.alibaba.com/product-detail/Original-26700-rechargeable-lifepo4-battery-4000mah_1600105085610.html?spm=a2700.wholesale.0.0.3d1526b632pc6q

[26650 LFP

- 3000mAh; $3.2

http://www.batterymanufactory.com/26650-3000mah-3-2v-lifepo4

- 3300mAh; W2029

https://www.alibaba.com/product-detail/High-power-Cylindrical-Battery-Lifepo4-26650_1600403700803.html?spm=a2700.galleryofferlist.normal_offer.d_image.410e5c20VG7cAP&s=p

- 3500mAh; 1845

https://www.alibaba.com/product-detail/Rechargeable-Cell-High-Power-8C-28A_1600361956904.html?spm=a2700.galleryofferlist.normal_offer.d_image.1cd344f0kXrzF0&s=p

[21700

- 3000mAh; W1906

https://korean.alibaba.com/product-detail/xinchi-lfp-lifepo4-21700-3-2v-3000mah-lithium-battery-cell-with-bis-certificate-1600177570265.html

- 3700mAh; $1.45

https://battery.en.made-in-china.com/product/iKexOXGPgmah/China-21700-3-7V-4800mAh-High-Rate-LiFePO4-Battery-Pack-Lithium-Li-ion.html

4500mAh; 2546원

https://www.alibaba.com/product-detail/21700-battery-4500mah-lifepo4-21700-lithium_62549026045.html

- 4800mAh; ?

http://korean.amtbattery.com/sale-13698273-lfp-3-2v-rechargeable-lifepo4-battery-21700-4800mah-2000-cycles-cylindrical.html

5000mAh; 3436원

https://www.alibaba.com/product-detail/High-Quality-GEB-21700-Original-3_1600383207761.html?spm=a2700.galleryofferlist.normal_offer.d_image.908e345fqZVKqi&s=p

- 6000mAh; W2681

https://www.alibaba.com/product-detail/3-2v-Lifepo4-Battery-Rechargeable-18650_1600302994238.html?spm=a2700.galleryofferlist.normal_offer.d_image.1cd344f0kXrzF0&s=p

[18650 LFP

1200mAh; 980원

https://www.alibaba.com/product-detail/LIFEPO4-3-2v-18650-1200mAh-lithium_62437411660.html?spm=a2700.galleryofferlist.normal_offer.d_image.213e6f1eaqQusr

1500, 2000, 2500 mAh; 1200원

https://www.alibaba.com/product-detail/High-Quality-3-2V-1500mAh-2000mAh_1600143761022.html?spm=a2700.galleryofferlist.normal_offer.d_image.213e6f1eaqQusr

2500mAh; 1719원

https://www.alibaba.com/product-detail/UN38-3-Approved-Deep-Cycle-Battery_62315964210.html?spm=a2700.galleryofferlist.normal_offer.d_image.213e6f1eaqQusr

1200-3400mAh; 300-2657

https://www.alibaba.com/product-detail/wholesale-cylindrica-lifepo4-battery-3-2V_1600315137296.html?spm=a2700.galleryofferlist.normal_offer.d_image.213e6f1eaqQusr