Battery Tender is a long-established American brand of battery maintainers, chargers, lithium replacement batteries, solar maintainers and connection leads. Its products are used on motorcycles, cars, boats, RVs, tractors and lawn equipment that sit unused for weeks or months at a time.
A good Battery Tender order comes down to matching the product to the job: keeping a healthy battery topped up is different from recovering a flat one, and lithium batteries have their own rules. The notes below cover how to choose.
Maintainer or charger: know the job
A Battery Tender maintainer is a low-output device designed to stay connected for long periods. It brings the battery to full, then switches to a float or monitoring mode and only tops up as needed. It is the right tool for a bike laid up over winter or a classic car used on weekends.
A higher-output Battery Tender charger is built to put charge back into a depleted battery in a reasonable time. It still maintains afterwards, but its main job is recovery. If you regularly find a car battery flat, you want the charger.
Neither fixes a battery that is failing. If a battery will not hold charge after a full cycle, replace it rather than buying a bigger Battery Tender.
Sizing the amps to the battery
Output is listed in amps on every Battery Tender product. Small, low-amp maintainers suit motorcycle, scooter and lawn-mower batteries. Larger car, truck and marine batteries benefit from a higher output, especially if they are ever deeply discharged.
Check the battery capacity printed on your battery and the recommended range on the Battery Tender product page. A charger that is too small for a large battery will take a very long time to recover it.
Voltage matters too. Most vehicles run 12-volt systems, but some older machines and equipment use 6-volt batteries. Battery Tender sells selectable and dedicated models; confirm yours matches before ordering.
Lithium batteries need a lithium-ready Battery Tender
Lithium iron phosphate batteries are increasingly common in motorcycles and powersports, and Battery Tender sells its own lithium replacement batteries. They must be charged with a unit that has a lithium mode or is designed for lithium chemistry.
Older lead-acid maintainers can use charging stages that are unsuitable for lithium. If your bike has a lithium battery, read the Battery Tender product description carefully and choose a model that explicitly lists lithium compatibility.
When buying a Battery Tender lithium battery, match it by fitment for your exact vehicle model and year rather than by physical size alone.
Leads, connectors and multi-bank units
Most Battery Tender maintainers use a quick-disconnect lead. A ring-terminal harness bolted permanently to the battery makes connecting a matter of seconds, which is why many owners leave one on each bike. Crocodile clips are included for occasional use on other vehicles.
Extension cables and panel-mount or plug adaptors are sold separately. For a collection of bikes or a boat with several batteries, a Battery Tender multi-bank unit charges each battery independently from one mains socket.
For vehicles parked away from power, a Battery Tender solar maintainer offsets slow drain. Check the panel output against your battery and expect less in winter light.
Safety and placement
Follow the manual for connection order and ventilation, particularly with flooded lead-acid batteries, which can release gas while charging. Keep the Battery Tender unit off the battery itself and away from fuel.
For marine use, check whether a model is described as weatherproof or suited to onboard installation. A garage maintainer is not the same as a boat-mounted one.
Warranty and returns
Battery Tender products carry a manufacturer warranty that varies by product. Register your purchase and keep the receipt. Check the current Battery Tender return window for unused items before ordering if you are unsure between two models.
Where the Battery Tender savings are
The 20% code is the one to try first on any Battery Tender order. On a multi-bank unit or a lithium battery it saves a noticeable amount.
The boating code is likely aimed at a summer marine promotion. Try it on marine chargers and boat batteries if the general code fails.
The 10% welcome code is the fallback for a first order. On a small maintainer it saves little either way, so combine purchases: a Battery Tender maintainer plus spare harness leads for each vehicle is a better basket for a percentage code.
Battery Tender codes are typically one per order and may exclude sale items. Compare any reduced price against full price with a code before checkout.
Common questions
Can I leave a Battery Tender connected all winter?
That is what a Battery Tender maintainer is designed for. Follow the manual on placement and ventilation.
Will my old Battery Tender charge a lithium battery?
Only if it has a lithium mode. Check the model, and buy a lithium-ready Battery Tender if not.
What Battery Tender do I need for a car?
A higher-amp model if the battery is ever run flat. A small maintainer suits a car that is simply stored.
Does Battery Tender make 6-volt models?
Yes, and some units are selectable. Match the voltage to your battery.
| Discount | Type | Get the deal |
|---|---|---|
| 20% off | Promo code | View at Battery Tender → |
| 20% off | Promo code | View at Battery Tender → |
| 15% off | Promo code | View at Battery Tender → |
| 10% off | Promo code | View at Battery Tender → |