Optimum storage is achieved at a state of charge of 40-50% of the total capacity. Li-ion batteries can basically be stored for a much longer period of time. I own a Charger One Model 2007 - How do I store my Li-Ion battery? Especially the storage in the glove compartment of the car should be avoided in summer. If you do not want to leave the battery connected, charge the battery fully and store the battery for no longer than 3 months in as cool a place as possible.Ī temperature between 10 and 15☌ is favorable (Attention! Storage in the apartment can be problematic in summer).Įxtreme example: Storing a fully charged Li-Ion battery at 40☌ (sunlight) will irreversibly damage the battery - up to complete failure. A recharge is automatically activated when the battery voltage drops, this is typically the case after about 60 days. The current consumption is not measurable, because the batteries are checked with short current pulses every 2-4 minutes. You can always leave the battery connected to the charger. How do I store a Li-Ion battery for several months? Forgetting" the discharged battery usually leads to deep discharges. Immediate charging after use is important. Likewise, the use of the maximum power should be reduced as far as possible when the remaining capacity is low. The use of the reserve tank should be limited to emergencies only. Accordingly, it is very beneficial to the service life to always fully charge the battery before each use. In order to keep the power of the lamp approximately at a constant level, the current must be increased when the voltage drops, which always means an additional load for the battery. High loads already below 40% of the capacity value stress the battery. If these combinations are unavoidable, it helps to use the highest power levels for as short a time as possible and, of course, to recharge as soon as possible after use. Very strong lamps and very small batteries reduce the life of the cells due to the high current load of the individual cell. The state of charge is comparatively insignificant. Direct exposure of the battery to sunlight on the bike should also be avoided. If the battery is left in the glove compartment, irreversible damage is unavoidable after only a few days. In summer temperatures, values of well over 50☌ can be reached in the car. Therefore, high temperatures should always be avoided. The damaging effect increases disproportionately with temperature and load. All temperatures above 25 ° C represent a load for the battery. Whether in storage or operating condition, high temperatures damage the battery under all circumstances. How can I maximize the life of my battery? Only then are the cells inside cold and become sluggish, the voltage level drops. Insulating the battery pack in the backpack delays cooling for 2-3 hours. Normally, a few simple measures will help to prevent the battery's performance from dropping significantly:Īlways fully charge the battery pack after use, store it in a warm place and only take it outdoors shortly before use. The capacity loss of completely cooled cells at -20☌ can be up to 30%. What is the capacity loss at low temperatures, during use? At higher temperatures, however, the loss is significantly higher, so avoid high temperatures above 25☌ during storage. 10% per year at 20☌ storage temperature, at lower temperatures even less. Li-Ion batteries are unbeatable in this respect: they only lose about max. How large is the self-discharge of Li-Ion batteries? This always results in somewhat lower nominal values than with other manufacturers, who discharge with low currents in order to achieve sales-promoting high values. In order to achieve practical values, we discharge with a high current of 5 A (40W), which is to be expected in reality. How do we determine the capacity of our batteries?
Whether or not 1000 charge and discharge cycles have taken place during this time is relatively irrelevant in this context. After 6 to 8 years, the battery is typically so tired that reliable use is not much fun and a replacement becomes desirable. Even then, the battery can still be used for a long time, but the capacity continues to decrease. This corresponds to a minimum usage time of about 3 - 5 years, if the battery is used twice a week. In general, you can assume a lifetime between 500-800 charge/discharge cycles before the capacity of the battery decreases significantly (70% of the nominal value). The service life of a battery pack depends on various factors: Mainly on the corresponding cell type, the stress and the care. How often can I charge a Li-Ion battery pack, how long is the life span?