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Прорыв JYH в области LFP аккумуляторов: зарядка LiFePO4 при низких темпер

Solving the Cold Weather Charging Problem

JYH Exhibited at Hong Kong Lighting Fair (Autumn Edition) 2023

Battery Characteristics in Personal Care Electronics

Guidelines For Safe Storage Of Lithium Batteries

Battery Characteristics in Personal Care Electronics

Date: 06,02,2023

Author: admin

Battery-powered electronic personal care products are suitable for travel or daily use due to their portability and the fact that they do not need to be plugged in. Depending on product requirements and designs, they are mainly divided into two categories: rechargeable batteries and disposable batteries (in below paragraph we only discuss cylindrical battery cells). Each of them has its own characteristics, which directly affect the product's portability, battery life, and user experience.

Common battery types and characteristics

1. Rechargeable Batteries (Secondary Batteries)
(1) Lithium-ion (Li-ion) Batteries
Key Features:
✅ High energy density, long battery life (such as electric toothbrushes can be used for 2-3 months or even 1 year)
✅ Can be recharged more than 500 times, low cost for long-term use
✅ Small size, light weight, suitable for portable devices
✅ No memory effect, charge and use at any time
✅ Low self-discharge, long-term storage and slow power decline
❌ Overcharge/overdischarge may affect life

Due to the lightweight requirements of electric toothbrushes, beauty devices, etc., in order to compress space, these products generally do not have protective boards. They only need to weld lead-out plates on the positive and negative poles of the battery and then insert them into the product's circuit board.

In the selection of cylindrical lithium-ion batteries, most models are small-sized, such as ICR10440-350, ICR14500-600, and ICR18500-1400. Due to the recent decline in lithium battery raw material prices, manufacturers have promoted "one charge per year" as a key selling point, leading to the emergence of many personal care products using ICR18650 batteries.

Additionally, for products with higher safety requirements—such as children's electric toothbrushes—lithium iron phosphate (LiFePO₄) batteries are often chosen, such as LFP10440-200, LFP14430-400 and LFP14500-600.

In this market segment, JYH specializes in compact lithium-ion battery cells, with core product offerings including 10370, 10440, 14430, 14500, 14650, 16300, 16340, 18350, and 18500 series models.
If you have other models and capacity requirements, please feel free to contact us.

Model	Nominal Voltage	Nominal Capacity	Standard charge (CC-CV)		Max. Discharge rate	Max. Internal resistance	Max. Dimensions		Weight approximate
	Nominal Voltage	Nominal Capacity	Current	Voltage		Max. Internal resistance	Diameter	Height	Weight approximate
	(V)	(mAh)	(mA)	(V)		(mOhm)	(mm)	(mm)	(g)
ICR10370-260	3.7	260	130	4.2	2C	100	10.5	37.0	7
ICR10440-320	3.7	320	160	4.2	2C	100	10.5	44.0	9
ICR10440-350	3.7	350	175	4.2	2C	100	10.5	44.0	9
ICR14430-650	3.7	650	325	4.2	2C	75	14.5	43.0	16
ICR14500-600	3.7	600	300	4.2	2C	80	14.5	49.5	18
ICR14500-750	3.7	750	375	4.2	2C	70	14.5	49.5	19
ICR14500-800	3.7	800	400	4.2	2C	70	14.5	49.5	19
ICR14500-850	3.7	850	425	4.2	2C	70	14.5	49.5	19
ICR14500-900	3.7	900	450	4.2	2C	70	14.5	49.5	20
ICR14500-950	3.7	950	475	4.2	2C	70	14.5	49.5	21
ICR14650-1000	3.7	1000	500	4.2	2C	60	14.5	65.5	25
ICR14650-1100	3.7	1100	550	4.2	2C	60	14.5	65.5	26
ICR14650-1200	3.7	1200	600	4.2	2C	60	14.5	65.5	26
ICR16300-650	3.7	650	325	4.2	2C	100	16.6	30.2	16
ICR16300-760	3.7	760	380	4.2	2C	100	16.6	30.2	17
ICR16340-700	3.7	700	350	4.2	2C	100	16.6	34.5	17
ICR16500-1200	3.7	1200	600	4.2	2C	70	16.6	49.5	28
ICR18350-900	3.7	900	450	4.2	2C	80	18.7	35.5	25
ICR18350-1000	3.7	1000	500	4.2	2C	80	18.7	35.5	25
ICR18500-1400	3.7	1400	700	4.2	2C	70	18.7	49.5	34
ICR18500-1500	3.7	1500	750	4.2	2C	60	18.7	49.5	34
ICR18500-1600	3.7	1600	800	4.2	2C	60	18.7	49.5	35
ICR18500-1700	3.7	1700	850	4.2	2C	60	18.7	49.5	35
ICR18500-2000	3.7	2000	1000	4.2	2C	55	18.7	49.5	35

(2) Nickel-Metal Hydride (Ni-MH) Batteries
Key Features:
✅ More eco-friendly than Ni-Cd (no toxic cadmium).
✅ ~500 recharge cycles, decent capacity.
❌ Faster self-discharge (~30% monthly when unused, LSD Ni-MH are ).

AA and AAA are common Ni-MH sizes that used in personal care product. Ni-MH is a good technology to replace Ni-Cd, yet the energy density is still lower than Li-ion.

2. Primary Batteries
(1) Alkaline Batteries (AA/AAA)
Key Features:
✅ Low cost, widely available (supermarkets, convenience stores).
✅ Plug-and-play, good for travel/backup.
❌ Limited energy, high-drain devices need frequent replacement.
❌ Not eco-friendly (hazardous waste if not recycled).

3. Battery Maintenance Tips
✅ For Rechargeables:

Avoid deep discharges (it’s better to recharge the battery when there’s low battery reminder).
Store at ~50% SOC if unused for months, and ambient temperature should lower than 30 deg.C
Use OEM chargers to prevent overcharging.

❌ For Disposables:

Never mix old/new batteries (risk of leakage).
Remove batteries if unused for long periods.

4. Future Trends for Personal Care Batteries

Fast Charging: Support fully charged in 1 hour or less time.
Long Cycles: The rechargeable cells that JYH produced support 600 cycle life, and provide a two-year warranty

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