Battery Tender Power Tender 8 A/2 A 12 V legacy charger review

The Battery Tender Power Tender 8 A/2 A, SKU 022-0337-DL-WH, is an earlier single-output 12 V charger. Its current manufacturer page says it has been replaced by SKU 022-1005, which the brand presents as an upgrade. The two products share an 8 A/2 A idea, but their manuals and supported features differ; this review keeps the legacy model distinct rather than treating it as an interchangeable spelling of the newer one.

One 12 V battery, two rate choices

The 392-0700-R0 manual identifies P/N 022-0337 and documents a selector for 2 A or 8 A. The 8 A option is the higher charging rate; the lower 2 A rate is available when a gentler pace suits the battery maker's instructions or storage routine. The unit does not add those numbers together, and it does not provide independent banks for two vehicles. Both rate choices serve one 12 V battery on one output. Select voltage and rate before connecting, then follow the manual's polarity and disconnection sequence.

Battery Tender's exact product FAQ says the model is optimally sized for 12 V batteries between 20 Ah and 150 Ah. The manual gives a timing example for a 15 Ah battery but does not define that as a supported lower or upper capacity boundary. The page's 20–150 Ah statement is therefore retained as the useful size range, while the manual's example should not be interpreted as permission to use every rate with every small battery. Confirm the battery manufacturer's allowed charging current; 8 A can be too aggressive for a battery whose instructions call for less.

The manual describes an automatic sequence from qualification to bulk and absorption and then float maintenance. It permits long connection periods under the stated instructions. That automatic transition is useful for a battery that is charged first and later maintained, but it does not make a damaged or deeply sulfated battery healthy. A charger is not a battery load test, and the manual's time examples do not guarantee recovery time for a particular car battery.

A lithium documentation conflict is a real limitation

The product image and manual cover/selector mention a lithium iron phosphate setting. But the same manual's safety section says to use the charger for lead-acid batteries only, and the exact-model page's FAQ says lithium owners should look at other models. Because those statements conflict at the level of safe use, this assessment does not count a LiFePO4 plan or tell a lithium owner to select that label. Obtain clarification from the manufacturer for the exact 022-0337 SKU before considering it for a lithium pack. The 022-1005 replacement has a separately identified LiFePO4 manual profile; that newer feature must not be inherited by the older model.

For lead-acid, the product FAQ explicitly lists flooded, AGM and gel-cell batteries, as well as sealed maintenance-free types. Match the exact subtype and nominal voltage with the battery maker's guidance. The manual calls for adequate ventilation, warns against charging frozen batteries, and says marine batteries must be taken ashore unless the charger is specifically designed for on-board marine use. It also says not to expose this charger to rain or snow; the reviewed 022-0337 sources do not establish an IP rating.

What replaces it—and what does not

Battery Tender identifies the 022-1005 as the successor, with lithium multi-chemistry support and a weather rating claimed for the newer product. It still has one 12 V output and 8 A/2 A rates, but its attached manual has its own unresolved IP and supply-mode statements. A shopper who needs those features should read the 022-1005 review and exact instructions rather than assume that every 8 A/2 A model carries the same safety conditions. The older 022-0337 remains useful as an earlier-model reference where the exact SKU can be verified; its sold-out display is not proof that every reseller package has the same contents or that one remains available.

The product page lists 120 V AC input, separate quick-disconnect ring-terminal and alligator-clip leads, and a five-year warranty claim. Confirm exact package contents, seller identity and warranty terms for the individual unit before buying. No particular seller stock or price is implied here. The main fit case is one compatible 12 V lead-acid battery when the 8 A maximum rate is approved and a portable AC charger is wanted; look elsewhere for 6 V or 24 V systems, multiple independent outputs, or documented lithium use. This is a source-based assessment of the exact model, not a hands-on test.