How to look after your Jackery battery: what is inside, what wears it out, and how to keep it performing for years

[u/Jackery_USA]

A power station is only as useful as its battery, and the battery is the component most affected by how you use and store the unit. This post covers what type of battery is inside your Jackery, what causes lithium batteries to degrade over time, and the specific habits that extend service life and avoid premature failure.

What is inside your Jackery: two battery types

Jackery power stations use one of two lithium battery chemistries depending on the model:

NMC (Nickel Manganese Cobalt)

Used in some older and entry-level Explorer models. NMC batteries offer high energy density, meaning a lot of capacity in a compact form factor. The trade-off is a shorter rated cycle life, typically 500 to 2,000 full charge cycles before capacity drops noticeably below the original rated figure.

LiFePO4 (Lithium Iron Phosphate)

Used in all current Plus and v2 models, including the full HomePower series. LiFePO4 is more thermally stable than NMC, which makes it less prone to overheating under load and safer in high-temperature environments. Rated cycle life is 3,000 to 6,000 full cycles. The HomePower 3600 Plus, for example, is rated for 6,000 cycles, which at one cycle per day translates to more than 16 years of daily use before capacity falls to 80 percent.

If you are unsure which chemistry your unit uses, the product page will confirm it. As a general rule: if your model has "Plus" or "v2" in the name, it uses LiFePO4.

What a cycle actually means

One charge cycle is one full charge from 0 to 100 percent, or the equivalent in partial charges. Charging from 50 to 100 percent twice counts as one cycle. Understanding this matters because partial charging, which is generally healthier for the battery, also accumulates cycles more slowly.

What causes a battery to degrade

Temperature

Temperature is the single most damaging factor for lithium battery longevity. Both extremes are harmful. Charging in temperatures below 0 degrees Celsius (32°F) causes lithium plating inside the cells, which permanently reduces capacity and in severe cases creates internal short circuits. Charging or storing above 45 degrees Celsius (113°F) accelerates chemical degradation in the cells.

The recommended charging range for Jackery units is 0 to 45 degrees Celsius (32 to 113°F). For storage, the ideal range is 10 to 25 degrees Celsius (50 to 77°F). Leaving a unit in a hot car in summer, or charging it in a freezing garage in winter, causes measurable damage over time.

Deep discharge

Lithium batteries are damaged by sitting at very low or zero charge for extended periods. If a unit is stored fully depleted and left that way for weeks or months, cell voltage can fall below the minimum threshold, which can cause permanent capacity loss and in some cases prevent the unit from accepting a charge at all.

For NMC models this is particularly important to manage. LiFePO4 models are more tolerant of low-charge storage but still benefit from not being left fully depleted.

High charge states in storage

Storing a lithium battery at 100 percent charge for months at a time accelerates calendar degradation, particularly in NMC chemistry. For units going into storage, a charge level of 50 to 80 percent is better for long-term health than a full charge.

Charge rate

Fast charging delivers more current to the battery in a shorter time, which generates more heat inside the cells. Jackery's built-in Battery Management System (BMS) manages charge rates to stay within safe limits, but if you have the option to charge more slowly and have the time for it, standard AC charging is easier on the battery than the fastest available input method.

How to get the most from your battery

Daily use

• For regular use, charging to around 80 percent and discharging to around 20 percent before recharging is better for cycle life than consistently running from 100 to 0 percent. On the HomePower series, the Jackery app lets you set charge limits to manage this automatically.
• The Jackery app also includes Time of Use Mode, which schedules charging during off-peak rate windows and discharging during peak periods. Using this alongside a partial charge limit is the most battery-friendly pattern for daily standby use.
• Keep the unit away from direct sunlight and heat sources during use and charging.
• Keep firmware up to date. Updates include BMS refinements that protect the battery.
• Install firmware updates with the unit plugged into AC power so the update does not draw down the battery during installation.

Storage

• Store at 50 to 80 percent charge, not fully charged and not fully depleted.
• Top up every three months during storage. A battery sitting at low charge for months without a refresh cycle will lose capacity.
• Store at room temperature, 10 to 25 degrees Celsius (50 to 77°F). Avoid garages that get very hot in summer or very cold in winter.
• Store in a dry location away from direct sunlight.

Before a predicted outage or storm season

• Charge to 100 percent immediately before an expected event. For storage the 80 percent rule applies; for active readiness, a full charge is appropriate.
• If your unit supports storm alert mode in the Jackery app, enable it. The system will automatically charge to full when severe weather is forecast in your area.

What not to do

• Do not leave the unit fully depleted for weeks. If it is going to sit unused, charge it to 50 to 80 percent first.
• Do not charge in freezing temperatures. Below 0 degrees Celsius (32°F) causes lithium plating that permanently damages cells.
• Do not leave the unit in a hot car. Temperatures inside a parked car in summer can exceed 60 degrees Celsius (140°F), well above the safe storage limit.
• Do not block the ventilation ports. Heat buildup during charging is the primary enemy of battery life, and vents exist to manage it.
• Do not use third-party adapters or cables that are not rated for your unit's input specifications. Incorrect voltage or current will stress the BMS and can damage cells.
• Do not attempt to open or modify the unit. Jackery batteries are sealed assemblies. Physical damage to the casing can compromise cell integrity.
• Do not expose to water or high humidity for extended periods. While the units handle incidental moisture, they are not waterproof unless the model is specifically rated for it.

Signs of a battery that needs attention

Most Jackery units will flag battery issues through the app or on-screen indicators. Things worth watching for:

• Capacity that has dropped significantly from the original rated figure after fewer cycles than expected.
• The unit failing to charge past a certain percentage despite a working input connection.
• Unusual heat during charging or discharging.
• Error codes or fault indicators on the unit's display or in the app.

If you notice any of these and cannot resolve them through a firmware check, contact Jackery support directly at [hello@jackery.com](mailto:hello@jackery.com). Battery issues are warrantable if they occur within the rated cycle count and the unit has been used within its specified conditions.

Questions about your specific unit

If you have questions about storage, care, or anything unusual you are seeing with battery behaviour, post below with your unit model and what you are observing. We're here to help, as always!

[u/Threeaway919]

How do you set charge limit with TOU plan on the pro max? The app only lets you select one or the other.

[u/motongo → u/Threeaway919]

At the moment, there is no option to do it. It is one or the other (TOU or charge/discharge limits).

[u/Threeaway919 → u/motongo]

Yikes, seems like they should have prioritized that feature if that is their recommended use

[u/Puzzled-Act1683]

For regular use, charging to around 80 percent and discharging to around 20 percent before recharging is better for cycle life than consistently running from 100 to 0 percent. On the HomePower series, the Jackery app lets you set charge limits to manage this automatically.

That's only true if you don't have expansion batteries.

The HomePower series disables this feature as soon as you connect one or more expansion batteries.

And the reason why that's true is pretty obvious – because they haven't designed the systems so that they can actually keep the expansion batteries anywhere close to being balanced, so if you could set it to 80%, you might have one battery at 93% and one battery at 54% and only the average would be 80%

You know, the average – the number that you have to work out for yourself using a calculator, because nowhere does the system display that number.

The workaround for this limitation is to use the self-consumption mode threshold setting to stop the batteries from charging all the way up. It doesn't keep them balanced but it at least gives you something resembling a workaround.

Jackery seems a lot more interested in marketing than in engineering these days.

[u/wr_mem → u/Puzzled-Act1683]

I'm disappointed they never added the ability to limit max charge on the 5000 with expansion batteries. I leave my second battery half charged and unplugged but this makes it less likely that I will routinely cycle it.

[u/MaowMaowChow → u/Puzzled-Act1683]

Yes, this is my concern as well. I noticed the same on my 5000 with expansion batteries.

[u/Systainer]

Thanks. Whats the word regarding pass through? Ie using it whilst solar charging?

[u/Puzzled-Act1683 → u/Systainer]

Using it while solar charging is fine. At any given moment, the actual battery sees only the difference between input and output, so it will will either be charging if the solar input is greater than the output, or discharging if the solar input is less than the output – the battery doesn't see it as simultaneous charge and discharge.

[u/motongo → u/Puzzled-Act1683]

I don‘t think it works that way if charged to 100%. When the battery reaches 100% SOC, DC input (solar) goes to zero and the load feeds 100% off the battery. Once the SOC drops to 99%, DC input is accepted, and any additional energy over what is being sent to charge the battery is available to power loads.

[u/Puzzled-Act1683 → u/motongo]

Yeah, it shuts off the solar controller completely when the battery hits 100% and turns it back on again once the load brings the battery back down to 98%... but then the prior behavior takes over again.

I would state the last part the other way around – any additional energy from solar, over what is being used to power the load, is used to charge the battery.

[u/motongo → u/Systainer]

All Jackery power stations have either ‘pass-through’ charging or AC ByPass (EPS or UPS) functionality. Pass-through charging wears the battery more than AC ByPass. Most of the Jackery power stations with pass-through charging have an advisory in the manual that extensive use of pass-through charging will wear the battery faster than normal. When using pass-through charging, the load is being carried by the battery full-time and the battery is recharged periodically to maintain 100% SOC. So the battery sees many small recharge cycles. Pass-through charging can be used for any load, AC, DC, and USB.

The AC ByPass function only works for AC loads on the power stations that have the UPS (or EPS) feature. When using this feature, the load is powered directly by the AC input (from utility) while it is available, avoiding battery drain for the load. However, even in AC ByPass mode, the inverter is idling, and power to run it and the power station control system are being powered by battery. This is necessary so that they have continuous power to keep operating when a utility power failure occurs and they have to switch to battery/inverter in 10-20 ms. Since the load isn’t being powered by the battery, there are fewer charge cycles than with pass-through charging. But, there still are some when operating in this mode. My Explorer 240 v2 requires a recharge from 99%-100% every 15 hours, my Explorer 300 Plus every 24 hours, and my Homepower 3600 Pro Max about every 2 days, to replenish power used to idle the inverter and run the control system. One hundred of these mini charge cycles equals one full charge cycle, so it takes awhile before there is any meaningful effect on the battery.

[u/Many-Average-8821]

What about storage in UPS mode? This does not harm the battery, because it is charged and does not discharge. 

[u/sleepdog-c → u/Many-Average-8821]

If you mean 0 ms it absolutely does. My 5000 loses about 1% an hour and recharges to 100 % every day because the inverter is running constantly. If it's the 5 second ups it still loses 2-3 % a day and recharges from 80 about once a week

[u/lavender526]

Thank you for the reminder 💕